[Bell UH-1H Iroquois helicopter in flight]
Photograph of a Bell UH-1H Iroquois (Huey) helicopter of the 240th Assault Helicopter Company, in flight over fields in Vietnam, circa 1970-1971. The photo was taken while en route to an air assault.
Caption from donor: "Formation flying to assault. In route formation were either staggered or echeon [echelon]."