180921-F-PO994-0106
Lt. Col. John Lesho, right, receives the 339th Flight Test Squadron guidon from Col. Christopher Zidek, 413th Flight Test Group commander, during a change of commander ceremony Sep. 21, 2018, at the Museum of Aviation, Warner Robins, Ga. By accepting the guidon, Lesho officially became the commander of the 339th FLTS. (U.S. Air Force photo by Jamal D. Sutter)