Disaster_Accident

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Firemen rescue wounded passengers from a commuter train after a crash in Buenos Aires on Wednesday, Feb. 22, 2012. The packed train slammed into the end of the line in Buenos Aires' busy Once station, killing scores and injuring hundreds, according to police. (Associated Press)

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Alex Ovechkin (8) of the Washington Capitals has the puck poked away by the Carolina Hurricanes' Brandon Sutter (16), with the Hurricanes' Tim Gleason nearby, during the first period of an NHL hockey game in Raleigh, N.C., on Monday, Feb. 20, 2012. (AP Photo/Karl B. DeBlaker)

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Paramedics care for wounded passengers from a commuter train that crashed at a railroad station in Buenos Aires on Wednesday, Feb. 22, 2012. (AP Photo/Leonardo Zavattaro,Telam)

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Washington Capitals' Alex Ovechkin has the puck poked away by Carolina Hurricanes' Brandon Sutter (16) with Hurricanes' Tim Gleason nearby, during the first period in Raleigh, N.C., Monday, Feb. 20, 2012. (AP Photo/Karl B DeBlaker)

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Carolina Hurricanes' Anthony Stewart, center left, is congratulated on his goal by teammates Eric Staal (12) and Jamie McBain (4) as Washington Capitals' Alexander Semin (28), of Russia, skates by during the first period of an NHL hockey game in Raleigh, N.C., Monday, Feb. 20, 2012. The Hurricanes won 5-0. (AP Photo/Karl B DeBlaker)

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Carolina celebrates a goal by Eric Staal as Washington defenseman Dennis Wideman skates by. The Hurricanes routed the Capitals 5-0 on Monday night. (Associated Press)

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** FILE ** Khalid Ali-M Aldawsari is escorted to the Mahon Federal Building in Lubbock, Texas, on Feb. 25, 2011. (AP Photo/Lubbock Avalanche-Journal, Zach Long, File)

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This undated photo provided by Stevens Pass Ski Resort shows Chris Rudolph. Rudolph and two other men died in an avalanche in an out-of-bounds area at the resort on Feb. 19, 2012. (Associated Press/Stevens Pass Ski Resort via the Seattle Times)

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Houses are seen Feb. 20, 2012, destroyed by Syrian government forces shelling, at Baba Amr neighborhood in Homs, Syria. An opposition group said several people have been killed in heavy shelling of a district in central Syria, a day after the army sent reinforcements ahead of a possible ground assault. (Associated Press/Local Coordination Committees in Syria)

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Carolina Hurricanes' Jerome Samson (71) has his shot blocked by Washington Capitals goalie Tomas Vokoun (29), of the Czech Republic, during the first period of an NHL hockey game in Raleigh, N.C., Monday, Feb. 20, 2012. (AP Photo/Karl B DeBlaker)

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Carolina Hurricanes' Eric Staal (12) gets taken down to the ice by Washington Capitals' Mike Green (52) but slides the puck under goalie Michal Neuvirth (30) for a goal during the second period of an NHL game in Raleigh, N.C., Monday, Feb. 20, 2012. The Hurricanes won 5-0. (AP Photo/Karl B DeBlaker)

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**FILE** Murray (left) and Kelly James look at their destroyed house in central Christchurch, New Zealand, on Feb. 23, 2011, a day after a magnitude-6.1 earthquake. (Associated Press)

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South Koreans gather in an underground shelter on Baengnyeong Island as the country's military began live-fire drills from front-line islands near its disputed sea border with North Korea on Monday, Feb. 20, 2012. (AP Photo/Yonhap)

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King County Sheriff's officers and other emergency officials work along Highway 2 near Stevens Pass ski resort in Skykomish, Wash., near where three skiers were killed in an avalanche Sunday, Feb. 19, 2012. The avalanche swept the three skiers about a quarter-mile down an out-of-bounds canyon at the popular resort. A fourth skier caught up in the slide was saved by a safety device, authorities said. (AP Photo/The Seattle Times, Erika Schultz)

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**FILE** Students try samples of AeroShot, an inhalable caffeine, from a lipstick-sized canister on the campus of Northeastern University in Boston. The FDA will review the safety and legality of the advertised dietary supplement. (Associated Press)

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Former Sen. John Glenn (left) and Scott Carpenter, the last surviving Mercury astronauts, speak at the Kennedy Space Center on Friday, Feb. 17, 2012, in Cape Canaveral, Fla., during an event marking the 50th anniversary of Mr. Glenn's launch into orbit. (AP Photo/Michael Brown)