Boston Marathon Bombing Investigation Continues

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Boston Police and Massachusetts State Police stand guard outside of... News PhotoAthletics,Bombing,Boston - Massachusetts,Boston Marathon,Boston Marathon Bombing,Concentration,Crime,Dzhokhar Tsarnaev,Guarding,Horizontal,Justice - Concept,Law,Massachusetts,Receiving,Suspicion,USAPhotographer Collection: Getty Images News 2013 Getty ImagesBOSTON, MA - APRIL 21: Boston Police and Massachusetts State Police stand guard outside of Beth Israel Deaconess Medical Center, where the Boston Marathon bombing suspect, Dzhokhar A. Tsarnaev, 19, is currently being held and receiving medical attention, on April 21, 2013 in Boston, 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 Jared Wickerham/Getty Images)