United States helicopters and B-52 Stratofortress in flight over Chu Lai in Dung Quat Bay, Vietnam.

United States Navy base Chu Lai in in Dung Quat Bay, Vietnam. Helicopters in flight in formation. Pilot seated in the cockpit. South Vietnamese Troops advance across the jungles. Troops loaded on jeeps. Helicopters in flight over jungles which conceal Viet Cong members. United States jet-powered bomber aircraft B-52 Stratofortress bomb on isolated hide-outs of Viet Cong.