COURTESY ASSOCIATED PRESS
Police in tactical gear surround an apartment building while looking for a suspect in the Boston Marathon bombings in Watertown, Mass., on Friday. All residents of Boston were ordered to stay in their homes Friday morning as the search for the surviving suspect in the marathon bombings continued after a long night of violence that left another suspect dead.
Officers wearing tactical gear arrive in Watertown on Friday, April 19, 2013. Reports of explosives being detonated and police are telling reporters to turn off their cell phones. Dozens of officers and National Guard members are in Watertown, where television outlets report that gunfire and explosions have been heard.
A police secure an area near the Massachusetts Institute of Technology campus Friday, April 19, 2013, in Cambridge, Mass. State police say a campus police officer at the Massachusetts Institute of Technology has died from injuries in a shooting on the campus outside Boston.
Harvard Business School professor Alvin Roth who is currently a visiting professor at Stanford University, listens at a press conference announcing his award of a shared Nobel Memorial Prize in Economic Sciences on Monday. He shares the prize with Lloyd Shapley, professor emeritus at UCLA.