This faded 35mm slide captures a Bell AH-1 Cobra attack helicopter banking through the sky over Vietnam. Introduced in 1967, the AH-1 was the U.S. Army's first purpose-built attack helicopter, providing close air support and armed escort for troop transports throughout the conflict. Photographs like this one, taken informally by servicemen in the field, offer a candid, ground-level perspective on American air power during the Vietnam War. Project: 218407