FILE - In this April 25, 2013 file photo, an honor guard stands in front of caskets prior to a memorial service in Waco, Texas for first responders who died in a April 17 fertilizer plant explosion in... more 
FILE - In this April 25, 2013 file photo, an honor guard stands in front of caskets prior to a memorial service in Waco, Texas for first responders who died in a April 17 fertilizer plant explosion in West, Texas. Four weeks later, investigators have yet to announce what prompted the fire and touched off the massive explosion that killed 14 people. (AP Photo/Eric Gay, File) less 
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Associated Press | Photo By Eric Gay, File
Wed, May 15, 2013 3:46 AM EDT