FILE - In this 1966 file photo, three U.S. Air Force C-123 aircrafts wing over the South Vietnamese countryside on their way to a defoliation mission during the Vietnam War. During the Vietnam War, ... more 
FILE - In this 1966 file photo, three U.S. Air Force C-123 aircrafts wing over the South Vietnamese countryside on their way to a defoliation mission during the Vietnam War. 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. Some veterans who flew in those planes after the war have been getting sick, and like many Vietnam veterans, they’re blaming the herbicides they say still coated the planes for decades. Their crusade has been led by a former Oregon resident and Air Force veteran. (AP Photo/U.S. Air Force, file) less 
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Associated Press | Photo By U.S. Air Force, file
Wed, May 14, 2014 3:30 PM EDT