This educational HD video watches how the United States developed helicopter door gunner position on aircraft intended & designed to deploy or pickup men from the field. This door position concept further implemented aboard CH-21, UH-34, and UH-1 helicopters by enlisted men specially designated and trained, with the aircraft crew chief serving as both the aircraft's maintenance manager and door positions. Normally, a second enlisted man served as a second door operator (such as on a UH-1, and U