2013
April 15 - 2013 Boston Marathon bombings: About three hours after the winners crossed the line in the Boston Marathon, two loud explosions occur near Copley Square just before the photo bridge that marks the finish line. 3 people are killed and over 170 are injured. A few days later suspect Tamerlan Tsarnaev is killed in a shoot-out with police after killing an officer. His brother Dzhokhar Tsarnaev is later arrested.