Witnesses to yesterday's Boston Marathon explosions include David Abel. He's a reporter for the Boston Globe. He was at the finish line yesterday afternoon around 3 o'clock, and Mr. Abel, what did you see and feel?
FBI Special Agent in Charge Richard DesLauriers said that they believed the devices used in the attack may have been pressure-cooker bombs stuffed with BBs and nails. Investigators said the bombs may have been left inside nylon bags or backpacks.