Doctor on Scene: ‘Tons of Mangled Extremities on the Ground’

Dr. Albert Pendleton was 5 feet from the finish line at the Boston Marathon when two explosions ripped through the street, killing three and injuring more than 130. He was knocked to the ground under the force of the bombs, and was able to recover in time to help the injured around him. He spoke from Boston with PBS NewsHour’s Hari Sreenivasan.