Boston bombings

BOSTON, United States - Residents of Watertown near Boston, Massachusetts, gather on April 20, 2013, at the site of a gunfight between the police and the two suspects in the Boston Marathon bombings. Seen at front right are bloodstains left by Tamerlan Tsarnaev, who was slain in the gunfight. Dzhokhar Tsarnaev, his brother, was arrested on April 19.