Disaster_Accident

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This undated photo provided by the New York State Police, shows Trooper Christopher Skinner, who was struck by a vehicle and killed, Thursday, May 29, 2014, while he was conducting a traffic stop outside his patrol car on Interstate 81 north of Binghamton, N.Y. The driver of the car that struck him was apprehended after pulling over and fleeing into near-by woods. (AP Photo/New York State Police)

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This May 25, 2014 image provided by the National Guard, shows guardsmen building a sandbag levy against the flood waters of the the swollen North Platte River in Saratoga, Wyo. The river is expected to come close to reaching the record flood stage in Saratoga on Saturday. (AP Photo/National Guard)

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This May 25, 2014 image provided by the National Guard, shows guardsmen building a sandbag levy against the flood waters of the the swollen North Platte River in Saratoga, Wyo. The river is expected to come close to reaching the record flood stage in Saratoga on Saturday.(AP Photo/National Guard)

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Pittsburgh Steelers safety Mike Mitchell, center, goes through drills with the defense during an NFL football organized team activity on Thursday, May 29, 2014 in Pittsburgh. (AP Photo/Keith Srakocic)

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Pittsburgh Steelers safety Mike Mitchell, (23) goes through drills with the defense during an NFL football organized team activity on Thursday, May 29, 2014 in Pittsburgh. (AP Photo/Keith Srakocic)

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This image provided by the U.S. Postal service shows a new postage stamp commemorating Nevada's 150th birthday, unveiled Thursday May 29, 2014 in Las Vegas. The design is an oil painting of Fire Canyon, which is part of Valley of Fire State Park in southern Nevada. Reno artist Ron Spears painted the landscape. (AP Photo/US Postal Service)

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FILE - In this Aug. 3, 2012 file photo, Washington Redskins safety Tanard Jackson speaks during a media availability at Redskins Park in Ashburn, Va. Jackson worked a 9-to-5 job in a warehouse to support his family during his latest NFL drug suspension. Now the safety is back for what is likely his last chance with the Redskins. (AP Photo/Alex Brandon, File)

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Emergency personnel from around Freeborn County, Minnesota, respond to a double fatality on Interstate 35 one mile north of the Iowa border Wednesday, May 29, 2014. (AP Photo/Albert Lea Tribune, Sarah Stultz)