Lt. Mike Murphy of the Newton, Mass., fire dept., carries an American flag down the middle of Boylston Street after observing a moment of silence in honor of the victims of the bombing at the Boston Marathon near the race finish line, Monday, April 22, 2013, in Boston, Mass. At 2:50 p.m., exactly one week after the bombings, many bowed their heads and cried at the makeshift memorial on Boylston Street, three blocks from the site of the explosions, where bouquets of flowers, handwritten messages, and used running shoes were piled on the sidewalk. (AP Photo/Robert F. Bukaty)
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