(ROUGH CUT ONLY - NO REPORTER NARRATION)<br /> <br />Members of the U.S. House of Representatives held a moment of silence Monday night (April 15) to remember victims of explosions at the finish line of the Boston Marathon.<br /> <br />Two explosions ripped through the crowd at the finish line on Monday, killing two people and injuring dozens on a day when tens of thousands of people pack the streets to watch the world famous race.<br /> <br />Runners were heading for the finish when a fireball and smoke rose from behind cheering spectators and a row of flags representing the countries of participants, video from the scene showed. Other pictures showed blood stains on the ground and several people knocked down.<br /> <br />An hour after the 2:50 p.m. EDT (1850 GMT) blasts in Boston's Copley Square marred the usually joyous end to the marathon, a fire erupted at the John F. Kennedy Presidential Library three miles (5 km) away, but no one was injured, police said.<br /> <br />Boston Police Commissioner Ed Davis told
