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exp Lead intv davis boston bombing investigation _00004728.jpg
exp Lead intv davis boston bombing investigation _00004728.jpg

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    'An investigation on steroids'

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'An investigation on steroids'

A behind-the-scenes look at the intense hunt for the Boston Marathon bombers. CNN's Jake Tapper reports.

'An investigation on steroids'

A behind-the-scenes look at the intense hunt for the Boston Marathon bombers. CNN's Jake Tapper reports.