Rep. McCaul: Gun powder likely used in bombs

New details on the devices that killed three people and injured at least 183 more at Monday's Boston Marathon.

House Homeland Security Chair, Congressman Mike McCaul told reporters today that it was quote, "most likely gun powder" that was used in the devices.

OutFront tonight: Rep. Mike McCaul (R-TX).

Filed under: Boston Marathon Explosion • News • Terror Attack


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