Bloody Sunday trial

In 1972, a march through a neighborhood in Derry, Northern Ireland, was intended to be peaceful. But that Sunday turned out to be anything but - it became known as "Bloody Sunday," when British paratroopers shot at an unarmed crowd of civilians, killing 13, with another later dying from his wounds. Don Mullan was 15 years old when he attended the march. His book "Bloody Sunday: Eyewitness" details what he and others witnessed that day. He discusses it with Host Marco Werman.