urban police department it s almost unheard of. so these officers acted heroically, courageously. they protected the community and they protected each other when they responded to this scene. i m so proud of the actions of the watertown police, the state police, the boston police, it s been an incredible team. martha: the people are proud of them, too. people in watertown, massachusetts, poured out of their homes to wave, to cheer, to clap, the enthusiasm, the relief, you could sense it. it was palpable. they lined the streets and cheered those police vehicles as they pulled away from the scene having done their job magnificently. so the suspected boston marathon bombers allegedly claiming the lives of four people. let s take a look at these young faces. this is 26-year-old sean collier. he was an mit police officer, killed in the line of duty, shot in a late night confrontation with the suspects days after the