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Pressure-Cooker Bomb Eyed in Boston Marathon

Joe Andruzzi and Matt Chatham raced into the chaos to help in whatever way they could.
02:22 | 04/17/2013

Transcript for Pressure-Cooker Bomb Eyed in Boston Marathon

Two pressure cooker devices loaded up with deadly shrapnel designed to maim anyone standing by and jim avila has more. It's not hard to find out how to build one. Reporter: It's not. Investigators are... See More
This transcript has been automatically generated and may not be 100% accurate.
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