US Army Sikorsky CH-54 Tarhe lifts another Tarhe.
A U.S. military helicopter sprays Agent Orange over Vietnam in this undated photo from the war.
Bell UH-1 Huey with 8th Cavalry Regiment troops
"Pilot’s view of marking a target with white phosphorus rockets. U.S. Air Force FACs found and marked targets on the Ho Chi Minh Trail."
