Exclusive | Witness Photos Captured Attack on the National Guard

It was a pre-Thanksgiving afternoon that few Americans could have imagined: U.S. troops defending themselves in a gunfight in the streets of the American capital.

A witness took photos of the ambush of the two National Guard troops that shows the suspect—an Afghan refugee with whom the Central Intelligence Agency had once worked—with a revolver in hand, U.S. National Guardsmen shooting back and fallen Guard members on the ground.