Invictus Warmup Team USA athlete Christian Perryman warms up for practice swimming heats at the 2016 Invictus Games in Orlando, Fla., May 5, 2016. The United States is among 15 countries competing in the 2016 Invictus Games. Air Force photo by Senior Master Sgt. Kevin Wallace SHARE: Download: Full Size (0.93 MB) Credit: Senior Master Sgt. Kevin Wallace VIRIN: 160505-F-WU507-005A.JPG Photo Gallery