Disaster_Accident

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About 200 people attend a candlelight vigil held at Centennial Plaza in Midland, Texas on Saturday, Nov. 17, 2012, in honor of the people involved in an accident where a Union Pacific train struck a float carrying military veterans on Thursday Nov. 15, 2012. Four veterans were killed, including one from the San Antonio area. (AP Photo/San Antonio Express-News, Edward A. Ornelas)

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This aerial photograph shows an oil rig damaged from an explosion and fire in the Gulf of Mexico, about 25 miles southeast of Grand Isle, La., Friday, Nov. 16, 2012. Four people were transported to a hospital with critical burns and two were missing. (AP Photo/Gerald Herbert)

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In this aerial photograph, a supply vessel moves near an oil rig damaged by an explosion and fire, Friday, Nov. 16, 2012, in the Gulf of Mexico about 25 miles southeast of Grand Isle, La. Four people were transported to a hospital with critical burns and two were missing. (AP Photo/Gerald Herbert)

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A Palestinian man picks up a binder from the debris after an Israeli air strike on the building of Hamas' Ministry of Interior in Gaza City, Friday, Nov. 16, 2012. (AP Photo/Hatem Moussa)

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Palestinian firefighters try to extinguish a fire after an Israeli air strike on the building of Hamas' Ministry of Interior in Gaza City, Friday, Nov. 16, 2012. (AP Photo/Hatem Moussa)

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Bystanders react as emergency personnel work the scene where a trailer carrying wounded veterans in a parade was struck by a train in Midland, Texas, Thursday, Nov. 15, 2012. "Show of Support" president and founder Terry Johnson says there are "multiple injuries" after a Union Pacific train slammed into the trailer, killing at least four people and injuring 17 others. (AP Photo/Reporter-Telegram, James Durbin)

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U.S. Attorney General Eric H. Holder Jr. is joined at a news conference in New Orleans about the BP oil spill settlement by Acting Associate Attorney General Tony West (far left) and Assistant Attorney General Lanny A. Breuer (second from right). BP agreed to plead guilty to felony manslaughter, environmental crimes and obstruction of Congress and to pay $4 billion in fines and penalties. (Associated Press)

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Plaquemines Parish Coastal Zone Director P.J. Hahn rescues a heavily oiled bird from the waters of Barataria Bay, which are laden with oil from the Deepwater Horizon oil spill, in Barataria Bay, La., on June 26, 2010. (AP Photo/Gerald Herbert)

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** FILE ** Oil from the BP Deepwater Horizon spill floats on the water with clouds reflected in the sheen on Barataria Bay off the coast of Louisiana, June 10, 2010. (AP Photo/Charlie Riedel)

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In this Sept. 4, 2010 file photo, the Deepwater Horizon blowout preventer is lifted out of the Gulf of Mexico by the Helix Q4000 near the coast of Louisiana. Before the key piece of evidence has even been analyzed, oil giant BP PLC on Wednesday, Sept. 8, 2010, planned to release the conclusions of its internal investigation into the rig explosion that killed 11 workers and led to the massive Gulf of Mexico spill. (AP Photo/Patrick Semansky, File)

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In this image taken from video provided by BP PLC, oil leaks from the fractured wellhead at the site of the Deepwater Horizon oil spill in the Gulf of Mexico, Sunday, July 11, 2010. (AP Photo/BP PLC)

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In this file photo made June 3, 2010, a brown pelican covered in oil sits on the beach at East Grand Terre Island along the Louisiana coast in the wake of the BP Deepwater Horizon rig explosion. Retired Coast Guard Adm. Thad Allen, the federal government's point man on the disaster, said Sunday, Sept. 19, 2010, BP's well "is effectively dead." A permanent cement plug sealed BP's well nearly 2.5 miles below the sea floor in the Gulf of Mexico, five agonizing months after an explosion sank a drilling rig and led to the worst offshore oil spill in U.S. history. (AP Photo/Charlie Riedel, File)