Mystery ring of radiation briefly encircled Earth

What were you doing last September? The charged particles that dance around Earth were busy. Unbeknown to most earthlings, a previously unseen ring of radiation encircled our planet for nearly the whole month – before being destroyed by a powerful interplanetary shock wave.

We already knew that two, persistent belts of charged particles, called the Van Allen radiation belts, encircle Earth. The discovery of a third, middle ring by NASA's twin Van Allen probes, launched in August 2012, suggests that these belts, which have puzzled scientists for over 50 years, are even stranger than we thought. Working out what caused the third ring to develop could help protect spacecraft from damaging doses of radiation.

Charged particles get trapped by Earth's magnetic field into two distinct regions, forming the belts. The inner belt, which extends from an altitude of 1600 to 12,900 kilometres, is fairly stable. But the outer belt, spanning altitudes ranging from 19,000 to 40,000 kilometres, can vary wildly. Over the course of minutes or hours, its electrons can be accelerated to close to the speed of light, and it can grow to 100 times its usual size.

Mystery acceleration

No one is sure what causes these "acceleration events", although it seems to have something to do with solar activity interacting with the Earths' magnetic field.

"That's one of the key things the probes are in place to understand," says Dan Baker of the University of Colorado, Boulder. "How does this cosmic accelerator, operating just a few thousand miles above our head, accelerate electrons to such extraordinarily high energies?"

When the Van Allen probes started taking data on 1 September 2012, one of these mysterious events was already under way. "We came in the middle of the movie there," Baker says. But otherwise, he says, "What we expected was what we saw when we first turned on: two distinct belts, separated."

That changed a day later when, to the team's surprise, an extra ring developed between the inner and outer ones. "We watched it develop right before our eyes," Baker says. The new, middle ring was relatively narrow, and its electrons had energies between 4 and 7.5 megaelectronvolts - about the same as in the outer Van Allen belt during an acceleration event.

Although the outer ring displayed its characteristic inconstancy, the new middle ring barely budged for nearly four weeks. Then a shock wave, probably linked to a burst of solar activity, wiped it out in less than an hour on 1 October.

Spacecraft malfunctions

It's not clear where the middle ring came from, Baker says, although it was probably related to the acceleration event. The electrons could have been stripped from the outer Van Allen belt, funnelled back towards the Earth and got trapped in the middle on the way, or they could have been energised from closer to Earth and shot up to higher altitudes.

Figuring out what happened could be important to protecting spacecraft from radiation damage, says Yuri Shprits of the University of California in Los Angeles, who was not involved in the observations but is crafting a theoretical explanation that he hopes to publish soon. "It truly presents us with a very important question, and very important puzzles," he says.

There were no specific spacecraft malfunctions during September that can be directly linked to the new belt, says Shprits. However satellite operators will want to know if such belts are common and if they pose more of a risk.

With no other examples of a transient belt caught so far, it's too soon to answer all those questions, Baker says. "We only have one in captivity," he says. "We're still trying to figure out exactly how it works."

Journal reference: Science, DOI: 10.1126/science.1233518

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Polls close in crucial British by-election

LONDON: Polls closed in the southern English town of Eastleigh on Thursday in a by-election for a new member of parliament in a tight contest that threatens serious repercussions for Britain's main parties.

The election pits Prime Minister David Cameron's Conservative Party against its junior coalition partner, the Liberal Democrats, while the anti-EU UK Independence Party (UKIP) is hoping to capitalise on voter disillusionment. First results are expected around 0200 GMT.

The election was sparked by the resignation of disgraced former energy minister Chris Huhne, a Liberal Democrat who has pleaded guilty to trying to avoid a speeding fine.

Nick Clegg, the embattled deputy prime minister and Lib Dem leader, has called it a "two-horse race" between his party and the Conservatives, while UKIP leader Nigel Farage predicted a "big" swing to his party.

The Lib Dems have been damaged by an ongoing sex scandal surrounding the party's former chief executive Chris Rennard, and the vote looks set to cause ructions within an already strained coalition, whatever the result.

On the eve of polling, Cameron urged Conservatives to back candidate Maria Hutchings, who vowed to help "get the country back on its feet" if she won.

But senior Conservative David Davis warned that a loss for the party would place serious doubt over Cameron's leadership of the party.

"If we came third it would be a crisis," Davis told BBC television. "And if it's a close second with UKIP on our tail it will also be uncomfortable."

More than 79,000 people were eligible to vote for one of the 14 candidates, and residents have been subjected to incessant campaigning since the election was called after Huhne's resignation on February 5.

Clegg visited Eastleigh on Wednesday to pledge his support for candidate Mike Thornton, saying he was on the "cusp of a great, great victory".

Addressing supporters at Lib Dems headquarters, Clegg called the race the "most exciting and closely contested by-elections" that he could remember.

Farage backed his candidate, Diane James, to "come up on the rails" and cause a major shock.

"If you gave me evens on us gaining more than 20 percent in this by-election I would have a very big bet," he said. "This is the campaign that has got momentum."

John O'Farrell, the candidate for the main opposition Labour party, is fighting not to finish in fourth place, and said he hoped voters would register their dissatisfaction at living standards by voting for his party.

-AFP/ac

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Audrey Hepburn shines again in new CGI ad

A computer-generated Audrey Hepburn swoons over an Italian gentleman in this cute commercial.

(Credit:
Sean Hepburn Ferrer, AMV BBDO, Luca Dotti)

No one can play Audrey Hepburn as well as Audrey Hepburn.

Through the magic of computer-generated imagery, the Galaxy chocolate company -- known as Dove outside the U.K. and Ireland -- has brought the deceased movie star back to life for a lovely one-minute commercial by ad agency AMV BBDO and visual-effects company Framestore.

The agency's first attempt at creating an authentic-looking Hepburn failed. The group cast a woman with similar eyes to the iconic star, and through face-scanning technology, digitally captured 70 face muscle movements as well as high-resolution textures from the double.

After extensive filming in an idyllic coastal town in Italy, animators tried to compile the double's eyes with a CGI visage of Hepburn, only to end up with subpar results. AMV BBDO went back to the drawing board as it became clear that only a perfect Hepburn would do.

The 3D team built the model of Hepburn, making use of the star's entire feature film catalog, plus all available press and documentary photographs as reference. However, as there was no technical lens information or measurements available for such old footage, it was quite an inexact science, involving tirelessly tweaking to refine the model from every possible angle.

The next big challenge was the look development process, which aimed to perfect the complex look of human skin. The team chose to adopt a brand new renderer, Arnold, which had not been used on such a big production in commercials before. This renderer was designed to simulate very accurately the tracing of light, and enabled the team to perfect the soft, translucent feel of real skin. Rendering in Arnold, however, also entailed adopting a completely new fur system for her eyebrows and the soft 'peach fuzz' on the face that breaks up the perfection of a raw CG render.

With the new footage put together, a team of four animators worked on re-creating Hepburn's infectious smile; many scenes required frame-by-frame hand animation techniques to finish the job. Check out the results below.

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Scarred Duckbill Dinosaur Escaped T. Rex Attack

A scar on the face of a duckbill dinosaur received after a close encounter with a Tyrannosaurus rex is the first clear case of a healed dinosaur wound, scientists say.

The finding, detailed in the current issue of the journal Cretaceous Research, also reveals that the healing properties of dinosaur skin were likely very similar to that of modern reptiles.

The lucky dinosaur was an adult Edmontosaurus annectens, a species of duckbill dinosaur that lived in what is today the Hell Creek region of South Dakota about 65 to 67 million years ago. (Explore a prehistoric time line.)

A teardrop-shaped patch of fossilized skin about 5 by 5 inches (12 by 14 centimeters) that was discovered with the creature's bones and is thought to have come from above its right eye, includes an oval-shaped section that is incongruous with the surrounding skin. (Related: "'Dinosaur Mummy' Found; Have Intact Skin, Tissue.")

Bruce Rothschild, a professor of medicine at the University of Kansas and Northeast Ohio Medical University, said the first time he laid eyes on it, it was "quite clear" to him that he was looking at an old wound.

"That was unequivocal," said Rothschild, who is a co-author of the new study.

A Terrible Attacker

The skull of the scarred Edmontosaurus also showed signs of trauma, and from the size and shape of the marks on the bone, Rothschild and fellow co-author Robert DePalma, a paleontologist at the Palm Beach Museum of Natural History in Florida, speculate the creature was attacked by a T. rex.

It's likely, though still unproven, that both the skin wound and the skull injury were sustained during the same attack, the scientists say. The wound "was large enough to have been a claw or a tooth," Rothschild said.

Rothschild and DePalma also compared the dinosaur wound to healed wounds on modern reptiles, including iguanas, and found the scar patterns to be nearly identical.

It isn't surprising that the wounds would be similar, said paleontologist David Burnham of the University of Kansas Biodiversity Institute, since dinosaurs and lizards are distant cousins.

"That's kind of what we would expect," said Burnham, who was not involved in the study. "It's what makes evolution work—that we can depend on this."

Dog-Eat-Dog

Phil Bell, a paleontologist with the Pipestone Creek Dinosaur Initiative in Canada who also was not involved in the research, called the Edmontosaurus fossil "a really nicely preserved animal with a very obvious scar."

He's not convinced, however, that it was caused by a predator attack. The size of the scar is relatively small, Bell said, and would also be consistent with the skin being pierced in some other accident such as a fall.

"But certainly the marks that you see on the skull, those are [more consistent] with Tyrannosaur-bitten bones," he added.

Prior to the discovery, scientists knew of one other case of a dinosaur wound. But in that instance, it was an unhealed wound that scientists think was inflicted by scavengers after the creature was already dead.

It's very likely that this particular Edmontosaurus wasn't the only dinosaur to sport scars, whether from battle wounds or accidents, Bell added.

"I would imagine just about every dinosaur walking around had similar scars," he said. (Read about "Extreme Dinosaurs" in National Geographic magazine.)

"Tigers and lions have scarred noses, and great white sharks have got dings on their noses and nips taken out of their fins. It's a dog-eat-dog world out there, and [Edmontosaurus was] unfortunately in the line of fire from some pretty big and nasty predators ... This one was just lucky to get away."

Mysterious Escape

Just how Edmontosaurus survived a T. rex attack is still unclear. "Escape from a T. rex is something that we wouldn't think would happen," Burnham said.

Duckbill dinosaurs, also known as Hadrosaurs, were not without defenses. Edmontosaurus, for example, grew up to 30 feet (9 meters) in length, and could swipe its hefty tail or kick its legs to fell predators.

Furthermore, they were fast. "Hadrosaurs like Edmontosaurus had very powerful [running] muscles, which would have made them difficult to catch once they'd taken flight," Bell said.

Duckbills were also herd animals, so maybe this one escaped with help from neighbors. Or perhaps the T. rex that attacked it was young. "There's something surrounding this case that we don't know yet," Burnham said.

Figuring out the details of the story is part of what makes paleontology exciting, he added. "We construct past lives. We can go back into a day in the life of this animal and talk about an attack and [about] it getting away. That's pretty cool."

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Obama Admin to Court: End Calif. Gay Marriage Ban

In a historic argument for gay rights, President Barack Obama on Thursday urged the Supreme Court to overturn California's same-sex marriage ban and turn a skeptical eye on similar prohibitions across the country.

The Obama administration's friend-of-the-court brief marked the first time a U.S. president has urged the high court to expand the right of gays and lesbians to wed. The filing unequivocally calls on the justices to strike down California's Proposition 8 ballot measure, although it stops short of the soaring rhetoric on marriage equality Obama expressed in his inaugural address in January.

California is one of eight states that give gay couples all the benefits of marriage through civil unions or domestic partnership, but don't allow them to wed. The brief argues that in granting same-sex couples those rights, California has already acknowledged that gay relationships bear the same hallmarks as straight ones.

"They establish homes and lives together, support each other financially, share the joys and burdens of raising children, and provide care through illness and comfort at the moment of death," the administration wrote.

Justin Sullivan/Getty Images

The brief marks the president's most expansive view of gay marriage and signals that he is moving away from his previous assertion that states should determine their own marriage laws. Obama, a former constitutional law professor, signed off on the administration's legal argument last week following lengthy discussions with Attorney General Eric Holder and Solicitor General Donald Verrilli.

In a statement following the filing, Holder said "the government seeks to vindicate the defining constitutional ideal of equal treatment under the law."

Obama's position, if adopted by the court, would likely result in gay marriage becoming legal in the seven other states: Delaware, Hawaii, Illinois, Nevada, New Jersey, Oregon and Rhode Island.

In the longer term, the administration urges the justices to subject laws that discriminate on sexual orientation to more rigorous review than usual, as is the case for claims that laws discriminate on the basis of race, sex and other factors.

The Supreme Court has never given gay Americans the special protection it has afforded women and minorities. If it endorses such an approach in the gay marriage cases, same-sex marriage bans around the country could be imperiled.

Friend-of-the-court briefs are not legally binding. But the government's opinion in particular could carry some weight with the justices when they hear oral arguments in the case on March 26.

Despite the potentially wide-ranging implications of the administration's brief, it still falls short of what gay rights advocates and the attorneys who will argue against Proposition 8 had hoped for. Those parties had pressed the president to urge the Supreme Court to not only overturn California's ban, but also declare all gay marriage bans unconstitutional.

Still, marriage equality advocates publicly welcomed the president's legal positioning.

"President Obama and the solicitor general have taken another historic step forward consistent with the great civil rights battles of our nation's history," said Chad Griffin, president of the Human Rights Campaign and co-founder of the American Foundation for Equal Rights, which brought the legal challenge to Proposition 8.

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Quantum skyfall puts Einstein's gravity to the test

DIVIDING a falling cloud of frozen atoms sounds like an exotic weather experiment. In fact, it's the latest way to probe whether tiny objects obey Einstein's theory of general relativity, our leading explanation for gravity.

General relativity is based on the equivalence principle, which says that in free fall, all objects fall at the same rate, whatever their mass, provided the only force at work is gravity. That has been proven for large objects: legend has it that Galileo did it first by dropping various balls from the Tower of Pisa. Whether equivalence holds at quantum scales, where gravity's effects are not well understood, isn't clear. Figuring it out could help create a quantum theory of gravity, one of the biggest goals of modern physics.

Creating a quantum equivalent of Galileo's test isn't easy. In 2010 a team led by Ernst Rasel of the University of Hannover in Germany monitored a quantum object in free fall, by tossing a Bose-Einstein condensate (BEC) – a cloud of chilled atoms that behaves as a single quantum object and so is both particle and wave – down a 110-metre tall tower. Now they have split and recombined the wave – all before the BEC, made of rubidium atoms, reached the bottom. This produces an interference pattern that records the path of the falling atoms and can be used to calculate their acceleration (Physical Review Letters, doi.org/km6). The next step is to do the same experiment on a different kind of atom, with a different mass, to see if the equivalence principle holds.

The BEC can only be split for 100 milliseconds in the tower before hitting the bottom, so to allow tiny differences between the atom types to emerge, the work must be repeated in space, where the waves can be split for longer. By showing that a matter-wave can be split and recombined while falling, Rasel's result is a "major step" towards the space version, says Charles Wang of the University of Aberdeen, UK.

This article appeared in print under the headline "Quantum skyfall tests Einstein's gravity"

If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.

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Japan's factory output up 1.0% in January

TOKYO: Japan's factory output for January rose a smaller-than-expected 1.0 per cent from the previous month, official data showed on Thursday.

The rise was weaker than a 1.5 per cent expansion expected by the market and a revised 2.4 per cent increase in December.

But the ministry maintained a positive view, saying in a monthly report: "Industrial production has bottomed out and shows some signs of picking up."

- AFP/ck

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Man-and-woman Mars trip by 2018? Can you say 'couples counseling'?

An artist's concept of a proposed Mars flyby spacecraft equipped with an inflatable habitat module.

(Credit:
Inspiration Mars)

A wealthy space tourist announced plans today to launch a high-risk manned flight to Mars in 2018, sending a man and a woman on a bare-bones 501-day round-trip flyby, passing just 100 miles above the Red Planet before heading back to Earth.

Dennis Tito, the first private citizen to fly aboard the International Space Station, said he will provide two years of funding to support the Inspiration Mars Foundation, a nonprofit he started to execute the proposed venture. Additional money will be raised from private sources.

"We have 50 years of experience," he told reporters during a news conference. "We can do things a lot faster, we just need a commitment. I'm not worried about getting this done from that standpoint. The vehicles are there, we have time to get it together."

In a statement, Tito said his organization is "engaging the best minds in industry, government, and academia to develop and integrate the space flight systems and to design innovative research, education, and outreach programs for the mission."

"This low-cost, collaborative, philanthropic approach to tackling this dynamic challenge will showcase U.S. innovation at its best and benefit all Americans in a variety of ways."

But building a reliable, affordable spacecraft in five years is just one issue facing mission planners. Spending nearly one-and-a-half years in the weightless environment of space poses a variety of health risks for the two-person crew, along with an increased risk of cancer due to the effects of space radiation.

And then there's the psychological stress associated with extended confinement in a vehicle the size of a motor home.

Homer Hickham, author or "Rocket Boys/October Sky," said in a Twitter posting: "A married couple in a bathroom for 501 days? I love my wife but rather take my cat and some good books."

He joked that a book about the trip might be titled "Murder on the Martian Express."

Homer Hickham, author or "Rocket Boys/October Sky," said in a Twitter posting: "A married couple in a bathroom for 501 days? I love my wife but rather take my cat and some good books."

But Jon Clark, a former NASA flight surgeon whose wife, Laurel Clark, perished in the 2003 Columbia disaster, said exhaustive screening procedures will be used to select candidates with excellent health, technical competence, and psychological stability.

Preflight training and well-established exercise protocols will help offset the effects of prolonged exposure to microgravity, but space radiation remains a major concern. Clark said NASA will not consider a mission that could result in a 3 percent excess cancer mortality rate over a lifetime.

The proposed Mars flyby mission is "in that ballpark," said Clark, who is working with the Inspiration Mars Foundation. "So, the real issue here is understanding the risk in an informed capacity. The crew would understand that. Ultimately, that is going to be the decision based on that informed consent."

Taber MacCallum, the chief technical officer for Inspiration Mars and CEO of Paragon Space Development, said it's "the kind of risk America used to be able to take."

"That's the kind of bold thing we used to be able to do, we don't do that anymore," he said. "We've shirked away from risk. I think just seriously contemplating this mission recalibrates what we believe is a risk worth taking for America."

As for the challenge of developing a manned flyby spaceraft in just five years, MacCallum said "American industry is up to this challenge."

"There are lots of options and ways to get this done," he said. "We have an amazing industrial base and it's about time America stood up and proved to the rest of the world we've got, bar none, the best industrial base in the world. Let's show it to them. Let's do this mission."

The SpaceX Dragon cargo ship as seen from the International Space Station in May. The company is working on a manned version of the capsule, a variant of which might be suitable for the Mars trip.

(Credit:
NASA TV)

The proposed trip would take advantage of a relatively rare alignment between Earth and Mars, allowing a spacecraft to follow a fast "free-return" trajectory.

Assuming a launch on January 5, 2018, the spacecraft could reach Mars in 228 days and simply loop around the planet, using gravity to fling it back toward Earth. The return trip would take 273 days and end with re-entry on May 21, 2019, at a record velocity of 31,000 mph.

The crew would rely on a closed-loop life-support system, recycling water, urine, and sweat using technology similar to that aboard the International Space Station.

While a specific mission architecture has not been established, the two-person crew likely will live and work in an inflatable habitat module attached to the capsule used for launch and entry. The idea is to utilize current technology with a minimum of automation, relying strongly on the crew's ability to operate the spacecraft and make repairs as needed.

Tito said a variety of launch vehicles should be available, including a proposed heavy-lift booster planned by Space Exploration Technologies, or SpaceX. The company also is working on a manned version of its Dragon cargo capsule, a variant of which might be suitable for the Mars trip.

Once on the way to Mars, the crew would not be able to abort and make a quick return to Earth if something went wrong. They would be committed to the full-duration 501-day mission.

MacCallum said mission planners are considering a 1,200-cubic-foot spacecraft, half of which would be filled with food, water, life-support equipment, and spare parts. The crew would have about 600 cubic feet of living space.

Tito did not have a realistic cost estimate, but he said he expected it to be in the range of a robotic Mars mission. NASA's twin Mars Exploration Rovers cost about $400 million each, while the more sophisticated Curiosity rover currently at work on the Red Planet cost some $2.5 billion.

"It uses low-Earth orbit architecture and we're just adapting it, in effect, to a very large Earth orbit that...just happens to go out pretty far," Tito said. "But you're really flying this mission without a propulsion system on the spacecraft, it's in the most simple form.

"Compared to, say, the landing missions, even if you could contemplate what an overall landing mission to Mars might cost or even in today's dollars what the Apollo missions cost, you're talking a factor of a hundred (less). This is really chump change."

Whatever the final price tag of the proposed manned flyby mission, Tito said he welcomed the opportunity to raise money, joking that media rights alone would be worth a fortune.

"Dr. Phil solving their marital problems, it will be great," Tito quipped.

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Why African Rhinos Are Facing a Crisis

The body count for African rhinos killed for their horns is approaching crisis proportions, according to the latest figures released by the International Union for Conservation of Nature (IUCN).

To National Geographic reporter Peter Gwin, the dire numbers—a rhinoceros slain every 11 minutes since the beginning of 2013—don't come as a surprise. "The killing will continue as long as criminal gangs know they can expect high profits for selling horns to Asian buyers," said Gwin, who wrote about the violent and illegal trade in rhino horn in the March 2012 issue of the magazine.

The recent surge in poaching has been fueled by a thriving market in Vietnam and China for rhino horn, used as a traditional medicine believed to cure everything from hangovers to cancer. Since 2011, at least 1,700 rhinos, or 7 percent of the total population, have been killed and their horns hacked off, according to the IUCN. More than two-thirds of the casualties occurred in South Africa, home to 73 percent of the world's wild rhinos. In Africa there are currently 5,055 black rhinos, listed as critically endangered by the IUCN, and 20,405 white rhinos. (From our blog: "South African Rhino Poaching Hits New High.")

Trying to snuff out poaching by itself won't work, said Gwin. The South African government is fighting a losing battle on the ground to gangs using helicopters, dart guns, high-powered weapons—and lots of money. (National Geographic pictures: The bloody poaching battle over rhino horn [contains graphic images].)

"Every year they get tougher on poaching, but rhino killings continue to rise astronomically," said Gwin. "Somehow they have to address the demand side in a meaningful way. This means either shutting down the Asian markets for rhino horn, or controversially, finding a way to sustainably harvest rhino horns, control their legal sale, and meet what appears to be a huge demand. Either will be a formidable endeavor."

Hope and Hurdles

The signing in December of a memorandum of understanding between South Africa and Vietnam to deal with rhino poaching and other conservation issues raises hope for some concrete action. Observers say the next step is for the two governments to follow through with tangible crime-stopping efforts such as intelligence sharing and other collaboration. The highest hurdle to stopping criminal trade, though, is cultural, Gwin believes. "In Vietnam and China, a lot of people simply believe that as a traditional cure, rhino horn works." (Related: "Blood Ivory.")

The recent climb in rhino deaths threatens what had been a conservation success story. Since 1995, due to better law enforcement, monitoring, and other actions, the overall rhino numbers have steadily risen. The poaching epidemic, the IUCN warns, could dramatically slow and possibly reverse population gains.

The population growth is also being stymied by South Africa's private game farmers, who breed rhinos for sport hunting and tourism and for many years have helped rebuild rhino numbers. Many of them are getting out of the business due to the high costs of security and other risks associated with the poaching invasions.

Those who still have rhinos on their farms will often pay a veterinarian to cut the horns off—under government supervision—to dissuade poachers, but the process costs more than $2,000 and has to be repeated when the horns grow back every two years. Even then the farmers are stuck with horns that are illegal to sell—and which criminals seek to obtain.

Room for Debate

Rhino killings and the trade in their horns will be a major topic at a high-profile conference, the 16th meeting of the Conference of the Parties to the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), which opens in Bangkok March 3. What won't surprise Gwin is if the issue of sustainably harvesting rhino horns from live animals comes up for discussion.

"It's an idea that seems to be gaining traction among some South African politicians and law enforcement circles," he said, noting that the international conservation community strongly opposes any talk of legalizing the trade of rhino horn, sustainably harvested or not. The bottom line for all parties in the discussion is clear, said Gwin: "The slaughter has to stop if rhinos are to survive."

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Holder Says Sequester Makes America Less Safe

The looming budget sequestration will make Americans less safe, Eric Holder says—and anyone who says otherwise isn't telling the truth.

"This is something that is going to have an impact on the safety of this country," the U.S. attorney general told ABC's Pierre Thomas on Wednesday in a wide-ranging, exclusive interview.

"And anybody that says otherwise is either lying or saying something that runs contrary to the facts," Holder said.

In his interview with ABC News, Holder reiterated warnings that if automatic spending cuts are triggered on Friday, the Justice Department will be handicapped in some of its most vital missions to prevent terrorist attacks and crime.

"The Justice Department is going to lose nine percent of its budget between now and September 30th. We're going to lose $1.6 billion. There are not going to be as many FBI agents, ATF agents, DEA agents, prosecutors who are going to be able to do their jobs," Holder said. "They're going to be furloughed. They're going to spend time out of their offices, not doing their jobs."

Portions of the interview will air Wednesday, February 27 on "ABC World News"

Patrick Semansky/AP Photo

Eric Holder Says Homegrown Terror Threat Equals International: Exclusive Watch Video

Eric Holder Remembers Newtown, His Worst Day on the Job: Exclusive Watch Video

President Obama's Cabinet members have been warning for weeks that budget sequestration, which will begin Friday unless Obama and Republicans reach a deficit-reduction deal to avoid it, will leave their agencies shorthanded and could bring about disastrous consequences. Homeland Security Secretary Janet Napolitano and Transportation Secretary Ray LaHood have both appeared at the White House press briefing room to warn that furloughs for border-patrol agents, TSA agents and air-traffic controllers will mean weakened border and port security, longer waits in airport security lines, and logjammed air travel.

Holder, for his part, warned in a Feb. 1 letter to the Senate Appropriations Committee that cuts to the FBI, the ATF, the U.S. Marshals Service, and U.S. Attorneys would limit the department's capacity to investigate crimes. Cuts at the Bureau of Prisons, Holder wrote, would mean lockdowns and potential violence, with fewer staff members on hand. In a separate letter, FBI Director Robert Mueller warned that counterterrorism operations would be affected, with the possible elimination of some joint terrorism task forces with state and local police. Limited surveillance and slower response times would mean unwatched targets and the possibility that individuals on terrorism watch lists could gain entry to the U.S.

"FBI's ability to proactively penetrate and disrupt terrorist plans and groups prior to an attack would be impacted," Mueller wrote.

To Holder, the problem is simple.

"If you don't have prosecutors and agents doing what we expect them to do, and we won't if this thing actually takes place, we are going to be a nation that is going to be less safe. And that is simple fact," Holder said.

Some Republicans have claimed the Obama administration is exaggerating the sequester's purported consequences as a ploy to campaign for tax hikes. On "Fox News Sunday" this week, Sen. Tom Coburn, R-Okla., posited that federal agencies enjoy enough flexibility to avoid the worst consequences of the cuts.

On Wednesday, Holder acknowledged that the Justice Department will do what it can to avoid compromised security, while maintaining that furloughs can't be avoided.

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