Watertown Police officer Brandon O'Neill holds a large U.S. flag... News PhotoAccidents and Disasters,Bestof,Bombing,Boston - Massachusetts,Boston Marathon,Boston Marathon Bombing,Candlelight,Conflict,Crime,Flag,Holding,Horizontal,Justice - Concept,Law,Massachusetts,Police Force,Social Issues,Terrorism,Topics,Topix,Track And Field,USA,Victim,Vigil,Watertown - MassachusettsPhotographer Collection: Getty Images News 2013 Getty ImagesWATERTOWN, MA - APRIL 20: Watertown Police officer Brandon O'Neill holds a large U.S. flag during a candlelight vigil for victims of the Boston Marathon bombing at Victory Park on April 20, 2013 in Watertown, Massachusetts. A manhunt for Dzhokhar A. Tsarnaev, 19, a suspect in the Boston Marathon bombing ended after he was apprehended on a boat parked on a residential property in Watertown, Massachusetts. His brother Tamerlan Tsarnaev, 26, the other suspect, was shot and killed after a car chase and shootout with police. The bombing, on April 15 at the finish line of the marathon, killed three people and wounded at least 170. (Photo by Kevork Djansezian/Getty Images)