“Two large explosions, just 50 yards apart, went off shortly before 3pm ET, more than four hours into the [Boston Marathon]. One of the explosions happened near the entrance of the Fairmont Copley Hotel, in Copley Square. The blast scattered hundreds of onlookers and runners, and left a bloody scene of injured spectators.” – Yahoo! News

Our thoughts go out to those affected by this tragedy, and we hope everyone is able to get in touch with loved ones that were watching or running in the race.

Photos from kenshinokubo, arturogossage, and The White House.