Colonel bids farewell to unit/F-15

Col. Sterling Tree, 339th Flight Test Squadron commander, parks an F-15 after completing his final flight as the unit's commander Sep. 20, 2018, at Robins Air Force Base, Ga. Tree is scheduled to relinquish command of the 339th FLTS to Lt. Col. John Lesho during a change of command ceremony. (U.S. Air Force photo by Jamal D. Sutter)

Col. Sterling Tree, 339th Flight Test Squadron commander, interacts with his family as he prepares to exit an F-15 Sep. 20, 2018, at Robins Air Force Base, Ga. This was Tree’s final flight in a military aircraft before departing Robins and taking on his next assignment at the Pentagon. (U.S. Air Force photo by Jamal D. Sutter)

Col. Sterling Tree, 339th Flight Test Squadron commander, receives a water shower from with his family Sep. 20, 2018, at Robins Air Force Base, Ga. The family celebrated Tree’s final flight in a military aircraft before relinquishing command of the 339th FLTS and taking on a new assignment at the Pentagon. (U.S. Air Force photo by Jamal D. Sutter)

Col. Sterling Tree, 339th Flight Test Squadron commander, greets friends and family after his final flight in an F-15 Sep. 20, 2018, at Robins Air Force Base, Ga. Tree is scheduled to relinquish command of the 339th FLTS to Lt. Col. John Lesho during a change of command ceremony. (U.S. Air Force photo by Jamal D. Sutter)

Col. Sterling Tree, 339th Flight Test Squadron commander, and his family take a group photo Sep. 20, 2018, at Robins Air Force Base, Ga. The family celebrated Tree’s final flight in a military aircraft before relinquishing command of the 339th FLTS and taking on a new assignment at the Pentagon. (U.S. Air Force photo by Jamal D. Sutter)