Two U.S. Marines fill out research consent forms before taking psychological tests at the Marine Corps Air Ground Combat Center in Twentynine Palms, Calif., on Sept. 29, 2009. The U.S. government is testing hundreds of Marines and soldiers before they ship out, in search of clues that might help predict who is most susceptible to post-traumatic stress disorder. (Associated Press) ** FILE **
** FILE ** The Total Port Arthur refinery is shown Wednesday, Dec. 2, 2009, in Port Arthur, Texas. Over the past several years, Total Petrochemical's sprawling oil refinery in southeast Texas has sprayed tons of sulfuric acid and carbon monoxide into the sky. The French company's 62-year-old facility has also released cancer-causing benzene, regularly surpassed allowable pollution limits, failed to report dozens of emissions and how much. Total is the most heavily fined polluter in Texas in the 2009 fiscal year, according to the year-end report summarizing how companies were punished in the state that produces the most industrial pollution. (AP Photo/David J. Phillip)
** FILE ** In this June 5, 2009, photo, workers give the final checkup to new Prius hybrid vehicles at Toyota's Tsutsumi Plant in Toyota, Japan. The Japanese government said on Wednesday, Feb. 3, 2010, it had received 14 complaints in Japan about brake problems with the popular hybrid. (AP Photo/Shizuo Kambayashi, File)
South Koreans watch a television screen showing undated file footage of a South Korean Navy ship near the disputed waters off South Korea's west coast, at a railway station in Seoul on Tuesday, Nov. 10, 2009. The two Koreas briefly exchanged naval fire Tuesday along their disputed western sea border, with a North Korean ship suffering heavy damage before retreating, South Korean military officials said. (AP Photo/Ahn Young-joon)
This file photo shows South Korea lifting the remaining half of the Cheonan from the Yellow Sea waters off Baengnyeong Island in April 2010. On March 26, 2010, the naval warship sank after a mysterious explosion that left 46 sailors dead. On July 9, 2010, investigators from South Korea, the U.S., Britain, Australia, Canada and Sweden concluded that it was struck by a torpedo of North Korean origin. (Yonhap via Associated Press)
Firefighters try to extinguish burning cars near to the Hadrian's Arch seen in the background, in Athens, Wednesday, May 5, 2010. Greek fire officials say three people have died in a blaze at an Athens bank during rioting over government austerity measures. An estimated 100,000 people took to the streets Wednesday during a nationwide wave of strikes against spending cuts aimed at saving the country from bankruptcy. (AP Photo/Thanassis Stavrakis)
A man looks at a broken section of Iceland's main coastal ring road near Reykjavik on after a volcanic eruption caused ice to melt and river levels to rise by up to 10 feet. (Associated Press) ** FILE **
This artist rendering shows NASA's next generation of moon rockets being developed at the Marshall Space Flight Center in Huntsville, Ala. Preliminary work on two Ares spacecraft has already cost NASA $7 billion.
A Bureau of Land Management helicopter rounds up wild horses near Cold Creek, Nev., in June 2002. A similar operation is under way to capture about 2,500 wild horses in the next two months. (Associated Press)
The green economy means the transformation of the nation's energy infrastructure from today's heavy reliance on carbon-intensive fossil fuels to a much stronger embrace of clean, renewable forms of energy. (Mark Fenton/Bread for the World)
Snow-covered traffic lights caused a fatal accident during a snowstorm in Oswego, Ill., in April. The problem stemmed from replacing incandescent lights with energy-efficient ones, which aren't hot enough to melt the snow.
ASSOCIATED PRESS PHOTOGRAPHS
Bo Burns (above and below) works at K&B Timberworks Inc., a recently reopened mill in Reserve, N.M., which was without one after 1990. The owner says the mill's future depends on federal contracts to thin forestland for wildfire prevention, funded in part by a federal timber law that has been extended beyond its original intent of helping communities hard hit by environmental restrictions on logging.
ASSOCIATED PRESS **FILE**
Job seekers line up in front of a Dollar General booth at a Little Rock, Ark., job fair in October. Some economists and business executives warn that health care and climate-change costs on corporations would stifle the ability of employers to hire workers.
Valero Energy Corp.'s Delaware City, Del., refinery lost about $1 million every day this year. Falling fuel demand has forced refineries across the country to shut down and put hundreds of employees out of work.