More than 500 villagers were killed

This weekend will mark the 40th anniversary of the My Lai Massacre. That refers to the killing of hundreds of civilians by U.S. soldiers in the Vietnamese village of My Lai in March 1968. It was one of the most controversial incidents of the Vietnam War. Gil Halsted reports on how a group of Quakers from Wisconsin has worked with the people of My Lai to overcome the pain and suffering caused by the killings.