Colonel Jeff Jenssen, 54th Fighter Group commander, Lt. Col. Marshall Chalverus, 54th Operations Support Squadron outgoing commander and Lt. Col. Jerod Rick, 54th OSS incoming commander, prepare to receive orders to formally change command during the 54th OSS change of command at Holloman Air Force Base, N.M., March 27, 2015. In the ceremony, Lt. Col. Jerod Rick assumed command of the 54th OSS from Lt. Col. Marshall Chalverus. The 54th OSS is a fighter training unit that trains 45 percent of all F-16 Falcon student pilots. They also manage Intelligence, Air Crew Flight Equipment, and Simulator and Training Devices. (U.S. Air Force photo by Airman 1st Class Emily Kenney / Released)