Boston Marathon 2013 Explosion

BOSTON - Two bombs exploded in the packed streets near the finish line of the Boston Marathon on Monday, killing two people and injuring more than 80 in a terrifying scene of shattered glass, billowing smoke, bloodstained pavement and severed limbs, authorities said. A senior U.S. intelligence official said two other explosive devices were found near the end of the 26.2-mile course. At the White House, President Barack Obama vowed that those responsible will "feel the full weight of justice." Video credit: http://www.youtube.com/watch?v=zV8Fms8lm7Q