Kelly Kistner, an assistant state fire marshal in Texas said that investigators are still trying to figure out what caused a deadly fertilizer plant explosion that killed at least 14 people. He said ... more 
Kelly Kistner, an assistant state fire marshal in Texas said that investigators are still trying to figure out what caused a deadly fertilizer plant explosion that killed at least 14 people. He said that debris there could provide answers. (May 2) less 
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Thu, May 2, 2013 10:30 PM EDT