Col. Jeffrey Brett, right, receives a certificate of retirement from retired Col. Jerry Byars during a retirement ceremony at the Museum of Aviation, Robins Air Force Base, Ga., June 22, 2018. Brett is a former commander of the 413th Flight Test Group who served in the position from March 2015 to June 2016. His most recent assignment was at Stuttgart, Germany, as a battle watch captain for the U.S. European Command. (U.S. Air Force photo by Jamal D. Sutter)