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On April 17, 2013, a fire and explosion occurred at the West Fertilizer Company in West, Texas. Twelve emergency responders and three members of the public died. More than 260 people were treated by local hospitals. The U.S. Chemical Safety and Hazard Investigation Board (CSB) investigated the incident. The CSB determined that about 40 percent of the 30 tons of fertilizer‐grade ammonium nitrate (FGAN)...