At a hilltop firebase west of Chu Lai in Vietnam, a huge army "Chinook" helicopter prepares to lift a conked-out smaller one to a base for repairs, April 27, 1969. The firebase is named LZ West and is manned by the troopers of the 196th Light Infantry Brigade forming part of the American Division. The smaller helicopter - a Huey UH-ID - had developed engine trouble so its crew chief called in the local aerial towing service. One sturdy nylon strap to the chopper's winch and the two were off. (AP Photo/Oliver Noonan)