8 / 26
Boston marathon explosions
BOSTON - APRIL 15: Two officials run away from the first explosion, right, on Boylston Street at the 177th Boston Marathon, April 15, 2013. (Photo by John Tlumacki/The Boston Globe via Getty Images)

What to Read Next

Explosions rock Boston Marathon

April 15, 2013

Two explosions struck the Boston Marathon as runners crossed the finish line on Monday, injuring many.