Boston Marathon Bombing Investigation Continues Day After Second Suspect Apprehended

WATERTOWN, MA - APRIL 20: Investigators work around the boat where Dzhokhar A. Tsarnaev was found hiding after a massive manhunt, in the backyard of a Franklin Street home, in an aerial view 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 Darren McCollester/Getty Images)