Sasha's View: 'Good Job, Daddy. You Didn't Mess Up'

President Barack Obama and Vice President Joe Biden today officially embarked on their second term, taking the Constitutionally mandated oath of office in two separate private ceremonies inside their homes.

Shortly before noon in the Blue Room of the White House, Obama raised his right hand, with his left on a family Bible, reciting the oath administrated by Chief Justice John Roberts. He was surrounded by immediate family members, including first lady Michelle Obama and daughters, Malia and Sasha.

As he hugged his wife and daughters, Sasha said, "Good job, Daddy."

"I did it," he said.

"You didn't mess up," she answered.

Biden was sworn in earlier today by Justice Sonia Sotomayor, the first Hispanic to administer a presidential oath, in a ceremony at his official residence at the U.S. Naval Observatory. He was joined by more than 120 guests, including cabinet members, extended family and his wife, Dr. Jill Biden.

Because Jan. 20 -- the official date for a new presidential term -- falls on a Sunday this year, organizers delayed by one day the traditional public inauguration ceremony and parade down Pennsylvania Avenue.

Vice President Joe Biden Sworn in for 2nd Term Watch Video

President Obama's 2nd Inauguration: Hundreds of Thousands to Attend Watch Video

Obama and Biden will each repeat the oath on Monday on the west front of the Capitol, surrounded by hundreds of dignitaries and members of Congress. An estimated 800,000 people are expected to gather on the National Mall to witness the moment and inaugural parade to follow.

The dual ceremonies in 2013 means Obama will become the second president in U.S. history to take the presidential oath four times. He was sworn in twice in 2008 out of an abundance of caution after Roberts flubbed the oath of office during the public administration. This year Roberts read from a script.

Franklin Roosevelt was also sworn in four times but, unlike Obama, he was elected four times.

This year will mark the seventh time a president has taken the oath on a Sunday and then again on Monday for ceremonial purposes. Reagan last took the oath on a Sunday in 1985.

Both Obama and Biden took the oath using a special family Bible. Obama used a text that belonged to Michelle Obama's grandmother LaVaughn Delores Robinson. Biden placed his hand on a 120-year-old book with a Celtic cross on the cover that has been passed down through Biden clan.

The official inaugural activities today also included moments of prayer and remembrance that marked the solemnity of the day.

Obama and Biden met at Arlington National Cemetery for a brief morning ceremony to place a wreath on the Tomb of the Unknowns, honoring military service members who served and sacrificed. The men stood shoulder to shoulder, bowing their heads as a bugler played "Taps."

Biden, who is Catholic, began the day with a private family mass at his residence. The president and first family attended church services at Metropolitan African Methodist Episcopal Church, a historically black church and site of two pre-inaugural prayer services for former President Bill Clinton and Vice President Al Gore and their families.

The Obamas and Bidens plan to participate in a church service on Monday morning at St. John's Episcopal, across Lafayette Park from the White House. They will also attend a National Prayer Service on Tuesday at the National Cathedral.

Later on Sunday evening, the newly-inaugurated leaders will attend a candlelight reception at the National Building Museum. The president and vice president are expected to deliver brief remarks to their supporters.

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Earth may be crashing through dark matter walls

Earth is constantly crashing through huge walls of dark matter, and we already have the tools to detect them. That's the conclusion of physicists who say the universe may be filled with a patchwork quilt of force fields created shortly after the big bang.

Observations of how mass clumps in space suggest that about 86 per cent of all matter is invisible dark matter, which interacts with ordinary matter mainly through gravity. The most popular theory is that dark matter is made of weakly interacting massive particles.

WIMPs should also interact with ordinary matter via the weak nuclear force, and their presence should have slight but measurable effects. However, years of searches for WIMPs have been coming up empty.

"So far nothing is found, and I feel like it's time to broaden the scope of our search," says Maxim Pospelov of the University of Victoria in Canada. "What we propose is to look for some other signatures."

Bubbly cosmos

Pospelov and colleagues have been examining a theory that at least some of the universe's dark matter is tied up in structures called domain walls, akin to the boundaries between tightly packed bubbles. The idea is that the hot early universe was full of an exotic force field that varied randomly. As the universe expanded and cooled, the field froze, leaving a patchwork of domains, each with its own distinct value for the field.

Having different fields sit next to each other requires energy to be stored within the domain walls. Mass and energy are interchangeable, so on a large scale a network of domain walls can look like concentrations of mass – that is, like dark matter, says Pospelov.

If the grid of domain walls is packed tightly enough – say, if the width of the domains is several hundred times the distance between Earth and the sun – Earth should pass through a domain wall once every few years. "As a human, you wouldn't feel a thing," says Pospelov. "You will go through the wall without noticing." But magnetometers – devices that, as the name suggests, measure magnetic fields – could detect the walls, say Pospelov and colleagues in a new study. Although the field inside a domain would not affect a magnetometer, the device would sense the change when Earth passes through a domain wall.

Dark matter walls have not been detected yet because anyone using a single magnetometer would find the readings swamped by noise, Pospelov says. "You'd never be able to say if it's because the Earth went through a bizarre magnetic field or if a grad student dropped their iPhone or something," he says.

Network needed

Finding the walls will require a network of at least five detectors spread around the world, Pospelov suggests. Colleagues in Poland and California have already built one magnetometer each and have shown that they are sensitive enough for the scheme to work.

Domain walls wouldn't account for all the dark matter in the universe, but they could explain why finding particles of the stuff has been such a challenge, says Pospelov.

If domain walls are found, the news might come as a relief to physicists still waiting for WIMPs to show up. Earlier this month, for instance, a team working with a detector in Russia that has been running for more than 24 years announced that they have yet to see any sign of these dark matter candidates.

Douglas Finkbeiner of the Harvard-Smithsonian Center for Astrophysics, who was not involved in Pospelov's study, isn't yet convinced that dark matter walls exist. But he is glad that physicists are keeping an open mind about alternatives to WIMPs.

"We've looked for WIMP dark matter in so many ways," he says. "At some point you have to ask, are we totally on the wrong track?"

Journal reference: Physical Review Letters, DOI: 10.1103/PhysRevLett.110.021803

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Obama blames "terrorists" for Algeria hostage deaths

WASHINGTON: US President Barack Obama said on Saturday that blame for deaths stemming from a hostage crisis in Algeria lay with the "terrorists" who had earlier taken foreigners captive at a remote gas plant.

The remarks were the president's first direct comments about the protracted hostage crisis. His statement was released several hours after Algerian troops stormed the gas plant to end a situation that had began four days earlier.

"Today, the thoughts and prayers of the American people are with the families of all those who were killed and injured in the terrorist attack in Algeria," Obama said.

"The blame for this tragedy rests with the terrorists who carried it out, and the United States condemns their actions in the strongest possible terms."

Obama said the attack by Al-Qaeda-linked gunmen at the In Amenas facility deep in the Sahara was a reminder of the threat posed by "Al-Qaeda and other violent extremist groups in North Africa."

The United States had been in constant contact with Algerian officials over the crisis, the president said.

"In the coming days, we will remain in close touch with the government of Algeria to gain a fuller understanding of what took place so that we can work together to prevent tragedies like this," Obama added.

Twenty-one hostages died during the siege and 32 kidnappers were also killed, while special forces were able to free "685 Algerian workers and 107 foreigners," according to Algeria's Interior Ministry.

Among the dead were an unknown number of foreigners -- including from Britain, France, Romania and the United States -- and many were still unaccounted for, including Japanese.

In Saturday's assault, "the Algerian army took out 11 terrorists, and the terrorist group killed seven foreign hostages," state television said, without giving a breakdown of their nationalities.

A security official who spoke to AFP as army helicopters overflew the plant gave the same death tolls, adding it was believed the foreigners were executed "in retaliation".

- AFP/de

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Microsoft blazes trail to next PC

Microsoft Surface Pro: the design isn't perfect, but the fact that it can function as a standalone tablet and is thin and light puts it ahead of the convertible-laptop pack.

(Credit:
CNET)

PC makers take note. Microsoft is pioneering the next PC.

Here are two simple reasons why the Surface Pro makes a good case as the template for the new PC. One, Microsoft realized that the device's electronics should go behind the glass, not under the keyboard. Two, the device uses a real processor.

Let's address the electronics first. Most of the newfangled laptops I saw at
CES were convertibles. That is, the displays are not detachable because the core electronics are under the keyboard, just like your father's laptop.

And most of them were unimpressive. The mechanics necessary to flip and/or slide the screen and convert the laptop to
tablet mode were more often than not kludgy and some seemed destined for mechanical problems down the pike.

And the more problematic designs weren't thin or light, either. At least not when compared with popular tablets like Apple's
iPad or Google's Nexus.

One of the few exceptions -- as I noted before -- was the HP EliteBook Revolve. That 11.6-inch design was about as well conceived as a convertible can be.

But there's a reason for that: HP has been building Windows convertibles for ages. The EliteBook 2700 series has been around since the dawn of Windows XP. So, HP has this down to a science.

But, again, that's a rare exception at present. The future leans more toward a PC with the electronics behind the glass. And there's no better example right now than the Surface Pro.

Microsoft was bold enough to go with a mainstream third-generation Core Intel "Ivy Bridge" chip, not the slower Atom processor that most Windows 8 tablet and detachable makers have opted for.

Yeah, the battery life won't be great, but Microsoft, I think, knew (rightly so) that it would be crucified if it opted for the performance-challenged Atom chip, which isn't up to the task of running serious desktop applications on Windows 8.

Remember the netbook? That's one way to look at the first crop of Atom-based Windows 8 tablets: a netbook in tablet clothing. Microsoft didn't want to go there.

And give Lenovo some credit too. It showed off the ThinkPad Helix detachable at CES that separates from the base to become a full-fledged Ivy Bridge-based tablet, not unlike the Microsoft Surface Pro.

And Intel, I think, in its heart of hearts knows Atom isn't really up to the task. Thus, the revelation at CES of the most power-efficient Ivy Bridge yet. One of Intel's goals is to get these new Ivy Bridge chips -- as well as upcoming "Haswell" chips -- behind the glass, as Intel's Adam King told me at CES.

So, I would expect to see an increasing number of Windows 8 tablets and/or detachables sporting Intel's mainstream Haswell Core processors later this year.

And battery life will improve with Haswell. I would be fine with a Windows 8 tablet packing a real Intel chip that gets six hours of battery life. And a Haswell-based Surface tablet should meet or exceed this.

Sony Vaio Duo 11 convertible: The apparatus to support the display in tablet mode isn't exactly elegant.

(Credit:
CNET)

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Attack at Algeria Gas Plant Heralds New Risks for Energy Development

The siege by Islamic militants at a remote Sahara desert natural gas plant in Algeria this week signaled heightened dangers in the region for international oil companies, at a time when they have been expanding operations in Africa as one of the world's last energy frontiers. (See related story: "Pictures: Four New Offshore Drilling Frontiers.")

As BP, Norway's Statoil, Italy's Eni, and other companies evacuated personnel from Algeria, it was not immediately clear how widely the peril would spread in the wake of the hostage-taking at the sprawling In Amenas gas complex near the Libyan border.

Map by National Geographic

Algeria, the fourth-largest crude oil producer on the continent and a major exporter of natural gas and refined fuels, may not have been viewed as the most hospitable climate for foreign energy companies, but that was due to unfavorable financial terms, bureaucracy, and corruption. The energy facilities themselves appeared to be safe, with multiple layers of security provided both by the companies and by government forces, several experts said. (See related photos: "Oil States: Are They Stable? Why It Matters.")

"It is particularly striking not only because it hasn't happened before, but because it happened in Algeria, one of the stronger states in the region," says Hanan Amin-Salem, a senior manager at the industry consulting firm PFC Energy, who specializes in country risk. She noted that in the long civil war that gripped the country throughout the 1990s, there had never been an attack on Algeria's energy complex. But now, hazard has spread from weak surrounding states, as the assault on In Amenas was carried out in an apparent retaliation for a move by French forces against the Islamists who had taken over Timbuktu and other towns in neighboring Mali. (See related story: "Timbuktu Falls.")

"What you're really seeing is an intensification of the fundamental problem of weak states, and empowerment of heavily armed groups that are really well motivated and want to pursue a set of aims," said Amin-Salem. In PFC Energy's view, she says, risk has increased in Mauritania, Chad, and Niger—indeed, throughout Sahel, the belt that bisects North Africa, separating the Sahara in the north from the tropical forests further south.

On Thursday, the London-based corporate consulting firm Exclusive Analysis, which was recently acquired by the global consultancy IHS, sent an alert to clients warning that oil and gas facilities near the Libyan and Mauritanian borders and in Mauritania's Hodh Ech Chargui province were at "high risk" of attack by jihadis.

"A Hot Place to Drill"

The attack at In Amenas comes at a time of unprecedented growth for the oil industry in Africa. (See related gallery: "Pictures: The Year's Most Overlooked Energy Stories.") Forecasters expect that oil output throughout Africa will double by 2025, says Amy Myers Jaffe, executive director of the energy and sustainability program at the University of California, Davis, who has counted 20 rounds of bidding for new exploration at sites in Africa's six largest oil-producing states.

Oil and natural gas are a large part of the Algerian economy, accounting for 60 percent of government budget revenues, more than a third of GDP and more than 97 percent of its export earnings. But the nation's resources are seen as largely undeveloped, and Algeria has tried to attract new investment. Over the past year, the government has sought to reform the law to boost foreign companies' interests in their investments, although those efforts have foundered.

Technology has been one of the factors driving the opening up of Africa to deeper energy exploration. Offshore and deepwater drilling success in the Gulf of Mexico and Brazil led to prospecting now under way offshore in Ghana, Mozambique, and elsewhere. (See related story: "New Oil—And a Huge Challenge—for Ghana.") Jaffe says the Houston-based company Anadarko Petroleum has sought to transfer its success in "subsalt seismic" exploration technology, surveying reserves hidden beneath the hard salt layer at the bottom of the sea, to the equally challenging seismic exploration beneath the sands of the Sahara in Algeria, where it now has three oil and gas operations.

Africa also is seen as one of the few remaining oil-rich regions of the world where foreign oil companies can obtain production-sharing agreements with governments, contracts that allow them a share of the revenue from the barrels they produce, instead of more limited service contracts for work performed.

"You now have the technology to tap the resources more effectively, and the fiscal terms are going to be more attractive than elsewhere—you put these things together and it's been a hot place to drill," says Jaffe, who doesn't see the energy industry's interest in Africa waning, despite the increased terrorism risk. "What I think will happen in some of these countries is that the companies are going to reveal new securities systems and procedures they have to keep workers safe," she says. "I don't think they will abandon these countries."

This story is part of a special series that explores energy issues. For more, visit The Great Energy Challenge.

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NASA planet-hunter is injured and resting

Lisa Grossman, physical sciences reporter

(Image: NASA/Kepler mission/Wendy Stenzel)

NASA's planet-hunting Kepler telescope has put its search for alien Earths on hold while it rests a stressed reaction wheel.

The injured wheel normally helps to control the telescope's orientation, keeping it pointed continuously at the same patch of sky. Kepler stares at the thousands of stars in its field of view to watch for the telltale blinks that occur when a planet crosses in front of its star. It has found nearly 3000 potential planets outside our solar system since its launch in 2009, transforming the field of exoplanet research and raising hopes of someday finding alien life.

When it launched, Kepler had four reaction wheels: three to control its motion along each axis, and one spare. But last July, one wheel stopped turning. If the spacecraft loses a second wheel, the mission is over.

So when another wheel started showing signs of elevated friction on 7 January, the team decided to play it safe. After rotating the spacecraft failed to fix the problem, NASA announced yesterday that they're placing Kepler in safe mode for 10 days to give the wheel a chance to recover.

The hope is that the lubricating oil that helps the wheel's ball bearings run smoothly around a track will redistribute itself during the rest period.

The telescope can't take any science data while in safe mode. But if the wheel recovers on its own, Kepler's extended mission will run until 2016, leaving it plenty of time to make up for the lost days.

"Kepler is a statistical mission," says Charlie Sobeck, Kepler's deputy project manager at NASA's Ames Research Centre in Mountain View, California. "In the long run, as long as we make the observations, it doesn't matter a lot when we make the observations."

Despite the high stakes, the team doesn't seem too worried.

"Each wheel has its own personality, and this particular wheel has been something of a free spirit," Sobeck says. "It's had elevated torques throughout the mission. This one is typical to what we've seen in the past, and if we had four good wheels we probably wouldn't have taken any action."

"I prefer to picture the spacecraft lounging at the shore of the cosmic ocean sipping a Mai Tai so that she'll be refreshed and rejuvenated for more discoveries," wrote Kepler co-investigator Natalie Batalha in an email.

The team will check up on the wheel on 27 January and return to doing science as soon as possible.

There are two exoplanet missions currently being considered for after Kepler is finished, says Doug Hudgins at NASA Headquarters in Washington, DC. One, TESS (Terrestrial Exoplanet Survey Satellite), would scan the entire sky for planets transiting the stars nearest to the sun. The other, FINESSE (Fast Infrared Exoplanet Spectroscopy Survey Explorer), would take spectra of planets as they passed in front of their stars as a way to probe their atmospheres.

The missions are being evaluated now, and NASA will probably select one this spring, Hudgins says. The winner will launch in 2017.

If Kepler goes down with its reaction wheel, that won't affect which mission wins, he adds. "That's a straight-up competition based on the merits of the two concept study reports."

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Japan PM holds Algerian hostage task force meeting

TOKYO: Japanese Prime Minister Shinzo Abe attended a meeting Saturday of a government task force on the Algeria hostage crisis after cutting short a trip to Southeast Asia, a report said.

After arriving back in Tokyo Abe headed straight to his official residence where the meeting was to be held, Kyodo news agency reported.

"I would like to firmly respond," Abe was quoted as saying. He called for continued efforts to collect accurate information on the situation in Algeria and for close international cooperation during the crisis.

Al-Qaeda-linked gunmen, cited by Mauritania's ANI news agency, said they still held seven foreigners at a remote Algerian gas plant deep in the Sahara desert. An Algerian security official put their number at 10.

The kidnappers said they were still holding three Belgians, two Americans, one Japanese and a Briton, although Belgium said there was no indication any of its nationals were being held.

More workers remain unaccounted for, and the fate of at least 10 Japanese nationals and eight Norwegian hostages is still unknown.

The Islamist captors are demanding a prisoner swap and an end to French military action in Mali.

The meeting in Tokyo took place shortly after a joint news conference in Washington involving US Secretary of State Hillary Clinton and Japanese Foreign Minister Fumio Kishida.

"Japan takes the position that terrorism is definitely intolerable and impermissible," Kishida said.

"The government of Japan has been requesting the government of Algeria to place the utmost priority on ensuring the safety and the lives of the hostages," he added.

International criticism of the haste with which Algeria launched a dramatic military assault to rescue the hostages has been mounting, after an Algerian security official said it had left dead 12 hostages and 18 kidnappers.

Japanese plant builder JGC, which has 78 employees in the country, said it had now accounted for 17 of them -- seven Japanese and 10 others, including two Philippine nationals and a Romanian.

JGC president Koichi Kawana and other senior officials had left for Algeria by early Saturday, Kyodo reported.

- AFP/ck

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Researcher: Apps meant to spot skin cancer are inaccurate

Researchers ran 188 images of skin lesions through four apps and found that three apps incorrectly described at least 30 percent of the melanomas as benign.

(Credit:
Screenshot by Elizabeth Armstrong Moore/CNET)

When a patient asked Laura Ferris, an assistant professor of dermatology at the University of Pittsburgh School of Medicine, her opinion on smartphone apps that purport to distinguish between benign and malignant skin lesions, Ferris realized she'd never used one and decided to run images of melanomas through a few of the apps herself.

"When I saw the first few results come back of them being missed, I really started to get concerned," Ferris says in a school video. So she decided to investigate further, and reports this week in JAMA Dermatology that three out of four smartphone apps her team tested incorrectly described at least 30 percent of melanomas as "unconcerning."

The news comes the same week a Pew Research Center study found that 35 percent of Americans seek out medical diagnoses (not just remedies or information) online.

For the melanoma study, researchers uploaded 188 images of skin lesions to each of the four applications (they decided "not to make a direct statement about a particular app" and are thus not naming the apps they studied). The apps analyzed the images in different ways, including automated algorithms and images reviewed by an anonymous board-certified dermatologist.

It turns out that of the four melanoma apps studied, the most accurate one was not only the most expensive (costing $5 per image) but also was the only one to rely on the dermatologist to review the images. (In this case, just one of the 53 melanomas uploaded was incorrectly identified as benign.)

These results could be particularly problematic for those without the resources to go to an actual dermatologist or afford the most expensive app, especially if they take an "unconcerning" result as confirmation that they need not spend any more money investigating the area in question.

"If [users] see a concerning lesion but the smartphone app incorrectly judges it to be benign, they may not follow up with a physician," says Ferris, whose study was funded in part by the National Institutes of Health. "Technologies that decrease the mortality rate by improving self- and early-detection of melanomas would be a welcome addition to dermatology, but we have to make sure patients aren't being harmed by tools that deliver inaccurate results."

The researchers further warn that even though the free or low-cost apps are specified as educational only, they are not subject to regulatory oversight and should be used with caution.

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Attack at Algeria Gas Plant Heralds New Risks for Energy Development

The siege by Islamic militants at a remote Sahara desert natural gas plant in Algeria this week signaled heightened dangers in the region for international oil companies, at a time when they have been expanding operations in Africa as one of the world's last energy frontiers. (See related story: "Pictures: Four New Offshore Drilling Frontiers.")

As BP, Norway's Statoil, Italy's Eni, and other companies evacuated personnel from Algeria, it was not immediately clear how widely the peril would spread in the wake of the hostage-taking at the sprawling In Amenas gas complex near the Libyan border.

Map by National Geographic

Algeria, the fourth-largest crude oil producer on the continent and a major exporter of natural gas and refined fuels, may not have been viewed as the most hospitable climate for foreign energy companies, but that was due to unfavorable financial terms, bureaucracy, and corruption. The energy facilities themselves appeared to be safe, with multiple layers of security provided both by the companies and by government forces, several experts said. (See related photos: "Oil States: Are They Stable? Why It Matters.")

"It is particularly striking not only because it hasn't happened before, but because it happened in Algeria, one of the stronger states in the region," says Hanan Amin-Salem, a senior manager at the industry consulting firm PFC Energy, who specializes in country risk. She noted that in the long civil war that gripped the country throughout the 1990s, there had never been an attack on Algeria's energy complex. But now, hazard has spread from weak surrounding states, as the assault on In Amenas was carried out in an apparent retaliation for a move by French forces against the Islamists who had taken over Timbuktu and other towns in neighboring Mali. (See related story: "Timbuktu Falls.")

"What you're really seeing is an intensification of the fundamental problem of weak states, and empowerment of heavily armed groups that are really well motivated and want to pursue a set of aims," said Amin-Salem. In PFC Energy's view, she says, risk has increased in Mauritania, Chad, and Niger—indeed, throughout Sahel, the belt that bisects North Africa, separating the Sahara in the north from the tropical forests further south.

On Thursday, the London-based corporate consulting firm Exclusive Analysis, which was recently acquired by the global consultancy IHS, sent an alert to clients warning that oil and gas facilities near the Libyan and Mauritanian borders and in Mauritania's Hodh Ech Chargui province were at "high risk" of attack by jihadis.

"A Hot Place to Drill"

The attack at In Amenas comes at a time of unprecedented growth for the oil industry in Africa. (See related gallery: "Pictures: The Year's Most Overlooked Energy Stories.") Forecasters expect that oil output throughout Africa will double by 2025, says Amy Myers Jaffe, executive director of the energy and sustainability program at the University of California, Davis, who has counted 20 rounds of bidding for new exploration at sites in Africa's six largest oil-producing states.

Oil and natural gas are a large part of the Algerian economy, accounting for 60 percent of government budget revenues, more than a third of GDP and more than 97 percent of its export earnings. But the nation's resources are seen as largely undeveloped, and Algeria has tried to attract new investment. Over the past year, the government has sought to reform the law to boost foreign companies' interests in their investments, although those efforts have foundered.

Technology has been one of the factors driving the opening up of Africa to deeper energy exploration. Offshore and deepwater drilling success in the Gulf of Mexico and Brazil led to prospecting now under way offshore in Ghana, Mozambique, and elsewhere. (See related story: "New Oil—And a Huge Challenge—for Ghana.") Jaffe says the Houston-based company Anadarko Petroleum has sought to transfer its success in "subsalt seismic" exploration technology, surveying reserves hidden beneath the hard salt layer at the bottom of the sea, to the equally challenging seismic exploration beneath the sands of the Sahara in Algeria, where it now has three oil and gas operations.

Africa also is seen as one of the few remaining oil-rich regions of the world where foreign oil companies can obtain production-sharing agreements with governments, contracts that allow them a share of the revenue from the barrels they produce, instead of more limited service contracts for work performed.

"You now have the technology to tap the resources more effectively, and the fiscal terms are going to be more attractive than elsewhere—you put these things together and it's been a hot place to drill," says Jaffe, who doesn't see the energy industry's interest in Africa waning, despite the increased terrorism risk. "What I think will happen in some of these countries is that the companies are going to reveal new securities systems and procedures they have to keep workers safe," she says. "I don't think they will abandon these countries."

This story is part of a special series that explores energy issues. For more, visit The Great Energy Challenge.

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One American Confirmed Dead in Algeria

U.S. officials told ABC News that at least one American has been killed in the hostage standoff at an Algerian gas plant, and the family of the deceased American has been notified.

An al Qaeda-linked group called the Masked Brigade and led by the one-eyed jihadi Mokhtar Belmokhtar raided the BP joint venture facility in In Amenas on Wednesday, taking an undetermined number of hostages from more than half a dozen nations, including at least two Americans.

On Friday, the group demanded the release of two convicted terrorists held in U.S. prisons, including the "blind sheikh" who helped plan the first attack on New York's World Trade Center, in exchange for the freedom of two American hostages, according to an African news service.

The terror group reportedly contacted a Mauritanian news service with the offer. In addition to the release of Omar Abdel-Rahman, who planned the 1993 World Trade Center bombing, they demanded the release of Aifia Siddiqui, a Pakistani scientist who shot at two U.S. soldiers in Afghanistan in 2008.

Asked about the unconfirmed report of a proposed swap, State Department spokeswoman Victoria Nuland said firmly, "The United States does not negotiate with terrorists." She repeated the statement again when questioned further. She also said she was not prepared to get into any details about the status of Americans in "an ongoing hostage situation."

At least three Americans were being held hostage by the militants when the Algerian military mounted a rescue operation at the facility Thursday that reportedly resulted in casualties.

Five other Americans who were at the facility when it was attacked by the terrorists are now safe and believed to have left the country, according to U.S. officials.

Algeria Hostage Situation: Military Operation Mounted Watch Video

Reports that dozens of hostages were killed during the Algerian military's attempt to retake the compound have not been confirmed, though Algeria's information minister has confirmed that there were casualties. It's known by U.S. and foreign officials that multiple British, Japanese and Norwegian hostages were killed.

According to an unconfirmed report by an African news outlet, the militants said seven hostages survived the attack, including two Americans, one Briton, three Belgians and a Japanese national. U.S. officials monitoring the case had no information indicating any Americans have been injured or killed, but said the situation is fluid and casualties cannot be ruled out.

On Friday, a U.S. military plane evacuated between 10 and 20 people in need of medical attention, none of them American, from In Amenas and took them to an American medical facility in Europe. A second U.S. plane is preparing to evacuate additional passengers in need of medical attention.

British Prime Minister David Cameron told parliament today that the terror attack "appears to have been a large, well coordinated and heavily armed assault and it is probable that it had been pre-planned."

"The terrorist group is believed to have been operating under Mokhtar Belmokhtar, a criminal terrorist and smuggler who has been operating in Mali and in the region for a number of years," said Cameron.

Cameron said Algerian security forces are still in action at the facility. On Thursday, he said that the situation was "very bad … A number of British citizens have been taken hostage. Already, we know of one who has died. ... I think we should be prepared for the possibility for further bad news, very difficult news in this extremely difficult situation."

The kidnappers had earlier released a statement saying there are "more than 40 crusaders" held "including 7 Americans."

U.S. officials had previously confirmed to ABC News that there were at least three Americans held hostage at the natural gas facility jointly owned by BP, the Algerian national oil company and a Norwegian firm at In Amenas, Algeria.

"I want to assure the American people that the United States will take all necessary and proper steps that are required to deal with this situation," said Panetta. "I don't think there's any question that [this was] a terrorist act and that the terrorists have affiliation with al Qaeda."

He said the precise motivation of the kidnappers was unknown.

"They are terrorists, and they will do terrorist acts," he said.

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