Invictus Discus Air Force Staff Sergeant Gregory Walker throws a discus during track and field training in Fort Belvoir, Fla., in preparation for the Invictus Games, Sept. 4, 2023. Fifty-nine athletes will represent the U.S. at the competition in Dusseldorf, Germany. SHARE: Download: Full Size (0.87 MB) Tags: air force, sports Credit: Anthony Beauchamp, Air Force VIRIN: 230904-O-XX948-3735.JPG Photo Gallery