In this May 2, 2013 photo, Frank Patterson, coordinator of the Waco-McLennan County Office of Emergency Management and now the incident commander at West, answers question during a press conference in... more 
In this May 2, 2013 photo, Frank Patterson, coordinator of the Waco-McLennan County Office of Emergency Management and now the incident commander at West, answers question during a press conference in Waco, Texas about the explosion at a West, Texas fertilizer plant. Four weeks after the blinding blast, investigators have yet to announce what prompted the fire and touched off the massive explosion that killed 14 people. (AP Photo/Waco Tribune Herald, Rod Aydelotte) less 
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Associated Press | Photo By Waco Tribune Herald, Rod Aydelotte
Wed, May 15, 2013 3:46 AM EDT