People near the finish line of the Boston Marathon described horrific scenes of the chaos that followed two loud explosions in quick succession this afternoon, sending spectators rushing away from the scene in panic as others lay bloodied and wounded on the ground.
One witness, Aaron Michael told member station WGBH that he heard first one explosion and then another.
The explosions happened in quick succession four hours after the beginning of the race, the world's oldest and one of the most prestigious road races in the world. At that point, the majority of 27,000 runners had crossed the finish line. Thousands, however, were still out on the course.
Ethiopian runner Lelisa Desisa won the men's division at this year's Boston Marathon on Monday, finishing the 26.2 miles in 2 hours, 10 minutes and 22 seconds. It's the first win at Boston for the 23-year-old.
Since the drubbing that Superstorm Sandy gave the Northeast in November, there's a new sense of urgency in U.S. coastal cities. Even though scientists can't predict the next big hurricane, they're confident that a warmer climate is likely to make Atlantic storms bigger and cause more flooding.