Col. Douglas Strawbridge, commander of the 911th Airlift Wing, and Col. Karen Steiner, commander of the 911th Aeromedical Staging Squadron, stand at attention to start the assumption of command ceremony at the Pittsburgh International Airport Air Reserve Station, Pennsylvania, June 2, 2018. The ceremony is a military tradition that represents the passing of authority of a command from one officer to another and has great symbolism attached to the change of command. (U.S. Air Force Photo by Senior Airman Grace Thomson)