Glass and debris litter a street after a nearby building was leveled by an explosion Friday, Nov. 23, 2012 in downtown Springfield, Mass. (AP Photo/Springfield Republican, David Molnar) MANDATORY CREDIT

Associated Press
Glass and debris litter a street after a nearby building was leveled by an explosion Friday, Nov. 23, 2012 in downtown Springfield, Mass.  (AP Photo/Springfield Republican, David Molnar)  MANDATORY CREDIT
Glass and debris litter a street after a nearby building was leveled by an explosion Friday, Nov. 23, 2012 in downtown Springfield, Mass. (AP Photo/Springfield Republican, David Molnar) MANDATORY CREDIT
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