The police scanner crackled. Mayor Thomas M. Menino sat in his black SUV in Watertown and followed the final siege. He listened to voices of officers he knows, praying the nightmare would finally end.
Menino’s broken leg prevented him from climbing into the command center. He remained in the car, joined by his chief of staff, press secretary, and other top aides. After a barrage of gunfire, police had pinned the Boston Marathon bombings suspect in a boat in a backyard. Menino and his aides huddled close to the scanner, listening desperately.