Colonel Mike Miles, 388 th Maintenance Group commander, briefs Air Force Secretary Heather Wilson during a base visit, Jan. 23, 2019, at Hill Air Force Base, Utah. Hill AFB is slated to be home to three F-35 fighter squadrons with a total of 78 aircraft by the end of 2019. The active-duty 388th Fighter Wing and Air Force Reserve 419th Fighter Wing are the service’s first combat-capable F-35 units and will be home to three F-35 fighter squadrons, totaling of 78 aircraft by the end of 2019. (U.S. Air Force photo by R. Nial Bradshaw)