Boston authorities suspended all mass transit and urged people to stay indoors Friday as they searched for the second of two suspects in the Boston Marathon boming Monday. The first suspect was killed in a shootout overnight.
Police hold a man in handcuffs, who they later released, in a neighborhood of Watertown, Mass., Friday, April 19, 2013. Much of the town is blocked as police and federal officers hunt for suspects in the Boston Marathon explosions. The bombs that blew up seconds apart near the finish line of the Boston Marathon left the streets spattered with blood and glass, and gaping questions of who chose to attack and why. (AP Photo/Charles Krupa)