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BOSTON - APRIL 15: (EDITOR'S NOTE: THIS IMAGE CONTAINS GRAPHIC CONTENT) Injured people lie on the sidewalk near a barrier at the scene of the first explosion that went off near the finish line of the 117th Boston Marathon. (Photo by John Tlumacki/The Boston Globe via Getty Images)

Explosions rock Boston Marathon

April 15, 2013

Two explosions struck the Boston Marathon as runners crossed the finish

line on Monday, injuring many.

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