The Boston Marathon turned tragic on April 15, 2013 when two consecutive explosions went off near the finish line. It left spectators dead, 264 were injured and left the nation shocked. Review the timeline of events and timeline of the lives of the suspects.
Condolences have flooded in from around the world after two explosions at Monday's Boston Marathon killed three and injured more than 170. Here are some of the statements on the Boston Marathon explosions.