Staff Sgt. Skyler Williams, foreground, a crew chief assigned to the 388th Maintenance Squadron, and Staff Sgt. Colby Cole, a crew chief assigned to the 419th Maintenance Squadron, remove Accessory Drive Gearbox mounts from an F-16 Fighting Falcon aircraft during phase maintenance at Hill Air Force Base, July 26. The jet pictured is the last Hill AFB F-16 to go through phase at the base. The 388th and 419th Fighter Wings are transitioning to the F-35 Lightning II. (Paul Holcomb/U.S. Air Force)