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Shootings In Cambridge, Watertown Draw Massive Police Response

WATERTOWN, MA - APRIL 19: SWAT team members search for one remaining suspect at a residential building on April 19, 2013 in Watertown, Massachusetts. Earlier, a Massachusetts Institute of Technology campus police officer was shot and killed at the school's campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. According to reports, one suspect has been killed during a car chase and the police are seeking another - believed to be the same person (known as Suspect Two) wanted in connection with the deadly bombing at the Boston Marathon earlier this week. Police have confirmed that the dead assailant is Suspect One from the recently released marathon bombing photographs. (Photo by Mario Tama/Getty Images)

Boston bombing suspects

On April 18, the FBI identified and released images and video of two

brothers, Dzhokhar and Tamerlan Tsarnaev, the suspects in the Boston

Marathon bombing.