Disaster_Accident

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Vice President Joseph R. Biden (center) and Interior Secretary Ken Salazar (right) walk in front of the Wall of Names, containing the names of the 40 passengers and crew of Flight 93, as they arrive for a memorial service at the Flight 93 National Memorial in Shanksville, Pa., on Tuesday, Sept. 11, 2012. (AP Photo/Gene J. Puskar)

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Visitors to the Flight 93 National Memorial pause at the Wall of Names, containing the names of the 40 passengers and crew who died in the crash of United Flight 93, following a memorial service in Shanksville, Pa., on Tuesday, Sept. 11, 2012. (AP Photo/Gene J. Puskar)

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A visitor to the Flight 93 National Memorial pauses at the Wall of Names, containing the names of the 40 passengers and crew who died in the crash of United Flight 93, on Tuesday, Sept. 11, 2012, following a memorial service in Shanksville, Pa. (AP Photo/Gene J. Puskar)

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A boulder (top center) that represents the final resting place for the 40 passengers and crew of Flight 93 is viewed by visitors to the Flight 93 National Memorial after a memorial service in Shanksville, Pa., on Tuesday, Sept. 11, 2012. (AP Photo/Gene J. Puskar)

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Residents take photos of a flooded area after dikes on the Salmon River gave way in Truro, Nova Scotia, on Monday, Sept. 10, 2012. (AP Photo/The Canadian Press, Andrew Vaughan)

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The San Francisco skyline rises behind a row of Victorian homes. (Associated Press)

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Junior Shawn Lynch has bounced between receiver and safety with the Midshipmen, but her appears to have settled in as a wideout. He caught four passes for 87 yards in the season opener against Notre Dame in Dublin, Ireland. (Associated Press)

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Japanese protesters raise signs Sunday at a seaside park on Okinawa to oppose U.S. plans to deploy 12 MV-22 Osprey aircraft on the island. Safety concerns boiled over after Osprey crashes in Morocco and Florida earlier this year. (Associated Press)

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This Sept. 6 2012, photo provided by the DFW Airport Department of Public Safety shows Christopher Shell. When flying home to Texas to celebrate his 29th birthday on Thursday, Shell became became the unwitting victim of a midair explosives hoax that forced the plane's return to Philadelphia. (AP Photo/DFW Airport Department of Public Safety)

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In this photo provided by China's Xinhua News Agency, damaged cars are seen in Luozehe town, Yiliang County, southwest China's Yunnan Province, Friday, Sept. 7, 2012. A series of earthquakes collapsed houses and triggered landslides in a remote mountainous part of southwestern China on Friday, killing dozens of people with the toll expected to rise. (AP Photo/Xinhua, Zhou Hongpeng)

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Alexander Galimov was one of 44 who died in the plane crash carrying the Lokomotiv Yaroslavl team from Russia’s Kontinental Hockey League. (AP Photo/Misha Japaridze)