Ambulances line the street after explosions reportedly interrupted the running of the 117th Boston Marathon in Boston, Massachusetts April 15, 2013. Two explosions hit the Boston Marathon as runners crossed the finish line on Monday, killing at least two people and injuring 23 on a day when tens of thousands of people pack the streets to watch one of the world’s best known marathons. REUTERS/Dominick Reuter (UNITED STATES – Tags: SPORT ATHLETICS CIVIL UNREST DISASTER) – RTXYMYC