VIDEO: Boston Marathon Explosion, People Injured, Pictures

There were two explosions today at the finish line of the Boston Marathon in what was probably an act of terrorism. 93 people have been injured, and at least 2 people have died.

The explosions happened about 15 seconds apart at 2:50 PM eastern time--four hours after the beginning of the men's race. Most of the runners had finished the race, but many were still on the course.

There is much more information pouring in at Twitter and NPR..