MIT Mourns 26-Year-Old Cop Killed By Boston Bombers

Sean Collier, 26, joined the Massachusetts Institute of Technology's campus police force in January after a civilian job with the Somerville police department. Last night, the two young men apparently responsible for the Boston marathon bombing shot him while he was seated in his patrol car on Vassar St., starting a city-wide manhunt. Collier was just a five minute walk from student dormitories and right next to the 720,000-square foot building, designed by Frank Gehry, that houses MIT's famed a...