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Investigation uncovers new details in Boston Marathon explosions

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Investigation uncovers new details in Boston Marathon explosions

Investigation uncovers new details in Boston Marathon explosions
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Investigation uncovers new details in Boston Marathon explosions

by Channel_8_SanDiego Videos 2:12 mins

Authorities investigating the deadly bombings at the Boston Marathon have recovered a piece of circuit board that they believe was part of one of the explosive devices.

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