Capt. Joseph E. Walters, commander of the 911th Aircraft Maintenance Squadron, and Col. Clifford Waller, commander of the 911th Maintenance Group, pose for a photo with the squadron flag during an assumption of command ceremony at the Pittsburgh International Airport Air Reserve Station, Pennsylvania Aug. 3, 2019. Though the assumption of command ceremony is a largely symbolic, it allows the Airmen to meet and speak to their new commander after he or she takes command. (U.S. Air Force Photo by Senior Airman Grace Thomson)