Photo Gallery: Boston manhunt: Friday, April 19, 2013 27/60

Heavily armed police officers do house to house searches in the neighborhoods of Watertown, Mass. Friday, April 19, 2013, as a massive search continued for one of two suspects in the Boston Marathon bombing. A second suspect died in the early morning hours after an encounter with law enforcement. (AP Photo/Craig Ruttle) ORG XMIT: MACC115