As the North Vietnamese army closed in on Saigon fifty years ago, U.S. forces, personnel and South Vietnamese civilians struggled to evacuate to American ships offshore. CBS News national security correspondent David Martin reports on what became the largest helicopter evacuation in history, and talks with former service members who were on the ground and in the air during the Vietnam War. | CBS Sunday Morning

Saigon street food: What to eat in Ho Chi Minh City http://cnn.it/2h5uL3v | CNN Travel