

Following the identification of the suspects, they killed an MIT policeman, kidnapped a man in his car, and had a shootout with the police in nearby Watertown, during which two officers were severely injured (one of whom, DJ Simmonds, died a year later). Three days later, the Federal Bureau of Investigation (FBI) released images of two suspects, who were later identified as Chechen Kyrgyzstani-American brothers Dzhokhar Tsarnaev and Tamerlan Tsarnaev. Two terrorists and brothers, Dzhokhar Tsarnaev and Tamerlan Tsarnaev, planted two homemade pressure cooker bombs, which detonated 14 seconds and 210 yards (190 m) apart at 2:49 p.m., near the finish line of the race, killing 3 people and injuring hundreds of others, including 17 who lost limbs. The Boston Marathon bombing was a domestic terrorist attack that took place during the annual Boston Marathon on April 15, 2013. Sean Collier, 27, Wilmington, Massachusetts

Krystle Campbell, 29, Arlington, Massachusetts Martin Richard, 8, Dorchester, Massachusetts
