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The Tsarnaev Brothers, behind barricades at the Boston Marathon, before the bombs went off.
The Tsarnaev Brothers, behind barricades at the Boston Marathon, before the bombs went off.

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    Source: Suspects targeted July 4th event

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Source: Suspects targeted July 4th event

A law enforcement source says Boston bombing suspects initially targeted July 4th celebrations. Jason Carroll reports.

Source: Suspects targeted July 4th event

A law enforcement source says Boston bombing suspects initially targeted July 4th celebrations. Jason Carroll reports.