The Greg Koontz Alabama Boys perform during the 2018 Air and Space Expo April 28, 2018, at Joint Base Charleston, S.C. The Greg Koontz Alabama Boys perform during the 2018 Air Greg Koontz Air Shows will be performing at the Thunder Over Georgia 2019 Air Show at Robins Air Force Base, Georgia, Sept. 28-29. (U.S. Air Force photo by Staff Sgt. Christopher Hubenthal)