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Firefighters hose down the wreckage of a bus and a semitruck that collided, Thursday, April 10, 2014, just north of Orland, Calif., that left at least nine dead. Authorities said it is not yet clear what caused the crash but that it involved a tour bus, a FedEx truck and a Nissan Altima. (AP Photo/The Chico Enterprise-Record, Dan Reidel)

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