Boston police officials, surprised by intense opposition from residents, have significantly scaled back and delayed the start of a program that would allow officers to go into people's homes and search for guns without a warrant. The program, dubbed Safe Homes, was supposed to start in December, but has been delayed at least three times because of misgivings in the community. March 1 was the latest missed start date. One community group has been circulating a petition against the plan. Police officials trying to assuage residents' fears have been drowned out by criticism at some meetings with residents and elected...