This aerial photo shows the remains of a fertilizer plant destroyed by an explosion and an emergency responders vehicle, bottom left, in West, Texas, Thursday, April 18, 2013. Rescuers searched the smoking remnants for survivors of Wednesday night's thunderous fertilizer plant explosion, gingerly checking smashed houses and apartments for anyone still trapped in debris while the community awaited word on the number of dead. (AP Photo/Tony Gutierrez)

Associated Press
This aerial photo shows the remains of a fertilizer plant destroyed by an explosion and an emergency responders vehicle, bottom left, in West, Texas, Thursday, April 18, 2013. Rescuers searched the smoking remnants for survivors of Wednesday night's thunderous fertilizer plant explosion, gingerly checking smashed houses and apartments for anyone still trapped in debris while the community awaited word on the number of dead. (AP Photo/Tony Gutierrez)
This aerial photo shows the remains of a fertilizer plant destroyed by an explosion and an emergency responders vehicle, bottom left, in West, Texas, Thursday, April 18, 2013. Rescuers searched the smoking remnants for survivors of Wednesday night's thunderous fertilizer plant explosion, gingerly checking smashed houses and apartments for anyone still trapped in debris while the community awaited word on the number of dead. (AP Photo/Tony Gutierrez)
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