A woman kneels and prays at the scene of the first explosion on Boylston Street near the finish line of the 117th Boston Marathon on April 15, 2013. (Photo by John Tlumacki/The Boston Globe via Getty Images)
Marathon
A woman kneels and prays at the scene of the first explosion on Boylston Street near the finish line of the 117th Boston Marathon on April 15, 2013. (Photo by John Tlumacki/The Boston Globe via Getty Images)