Disaster_Accident

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Casinos along the Las Vegas Strip can be seen behind a plane that caught fire at McCarren International Airport, Tuesday, Sept. 8, 2015, in Las Vegas. An engine on the British Airways plane caught fire before takeoff. (AP Photo/John Locher)

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United Airlines CEO Jeff Smisek addresses a gathering at Newark Liberty International Airport, in Newark, N.J., in this Thursday, Nov. 14, 2013, file photo. Smisek, the chairman and CEO of United Airlines is stepping down in connection with an investigation into dealings with the agency that operates New York-area airports. (AP Photo/Mel Evans, file)

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James Madison

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Firefighters stand by a plane that caught fire at McCarran International Airport on Tuesday in Las Vegas. An engine on the British Airways plane caught fire before takeoff, forcing passengers to escape on emergency slides. (Associated Press)

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U.S. health authorities have worked feverishly with drug companies to come up with an Ebola vaccine after last year's outbreak. (Associated Press)

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This Aug, 31, 2005, file photo shows a man pushing his bicycle through flood waters near the Superdome in New Orleans after Hurricane Katrina left much of the city underwater. (AP Photo/Eric Gay, File)

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Mayor Yukiei Matsumoto, right, claps with children of Naraha residents during an event in Naraha, Fukushima, northern Japan, Saturday, Sept. 5, 2015. The Japanese town of Naraha on Saturday lifted a 2011 evacuation order that sent all its 7,400 residents away after the nearby Fukushima nuclear plant was crippled by a tsunami and spread contamination. Naraha was the first among seven municipalities forced to empty entirely due to radiation contamination following the massive earthquake and tsunami that sent the reactors into meltdown. (AP Photo/Koji Sasahara)

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This undated photo released by the Arizona Department of Public Safety shows a bullet hole in the windshield of a vehicle in Phoenix. Four vehicles traveling on the same freeway in the heart of Phoenix have been struck by gunshots in the last week, and the state police agency is appealing for information from the public as it conducts what it says is a robust investigation. (Arizona Department of Public Safety via AP)

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This photo taken April 23, 2015, shows the Colowyo Coal Mine near Craig, Colo. Federal regulators have recommended that the mine, which has been threatened with closure partly over its impacts on climate change, remain open for now. (Patrick Kelly/Craig Daily Press via AP)

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The Wrecking Crew -

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A protester yells at police outside the Ferguson, Mo., Police Department on Aug. 11, 2014, during a demonstration sparked by the fatal shooting of Michael Brown. (Associated Press) **FILE**

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U.S. Secretary of the Interior Sally Jewell speaks at an event at the Red Rock National Conservation area Wednesday, Sept. 2, 2015, near Las Vegas. (AP Photo/John Locher) ** FILE **

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Nine-month pregnant Aisha, from Ghana, holds the hand of her husband as she lies on a stretcher on the bridge of the Norwegian Siem Pilot ship, Wednesday, Sept. 2, 2015. The Siem Pilot is carrying to the Italian Port of Cagliari hundreds of migrants rescued in several operations in the Mediterranean sea. (AP Photo/Gregorio Borgia)

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Maryland quarterback Perry Hills (11) looks to pass against North Carolina State safety Dontae Johnson (25) and linebacker Brandon Pittman, back left, during the first half of an NCAA football game, Saturday, Oct. 20, 2012, in College Park, Md. (AP Photo/Nick Wass)

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A surfer catches a large wave at Honolii Beach Park, Monday, Aug. 31, 2015 near Hilo, Hawaii. Hurricane Ignacio is rapidly weakening and has moved farther away from the Hawaiian Islands, allowing forecasters to lift the tropical storm watches for the Big Island and Maui, but big and dangerous surf is expected through midweek. (AP Photo/Caleb Jones) ** FILE **