|This September 1965 file photo shows four "Ranch Hand" C-123 aircraft spraying liquid defoliant on a|
suspected Viet Cong position in South Vietnam. During the Vietnam War, Air Force C-123 planes sprayed
millions of gallons of herbicides over the jungles of Southeast Asia to destroy enemy crops and tree cover.
The military stopped the spraying by early 1971, but some Air Force Reserve units continued to fly the former
spray planes until the early 1980s. U.S. Air Force/AP