Jubilant South Vietnamese troops carry a North Vietnamese heavy machine gun from a bunker they had just knocked out, Aug. 11, 1972, near Highway 13, north of Saigon. The assault on the North Vietnamese bunker cost the Saigon troops two armored personnel carriers and they retreated to a roadside ditch. A second assault was beaten back by withering small arms and mortar fire. (AP Photo/Neal Ulevich)