Officials with the Boston Fire Department Hazardous Materials (Hazmat) Unit wrap up a garbage can along Commonwealth Avenue after two explosions occurred along the final stretch of the Boston Marathon on Boylston Street in Boston, Massachusetts, U.S., on Monday, April 15, 2013. Powerful bombs killed two people and injured scores near the finish of the Boston Marathon, turning one of the world’s oldest road races into bloody chaos. Photographer: Kelvin Ma/Bloomberg via Getty Images
