Boston Marathon blasts
April 15, 2013
Two bombs exploded in the crowded street near the finish line of the Boston Marathon, killing two people and injuring more than 180 others so far. The explosions occurred about four hours into the race and about three hours after the men's winner crossed the line. By that point, more than 17,000 of the runners had finished the race, but thousands of others were farther back along the course.