U.S. Air Force aircraft maintainers assigned to the 158th Fighter Wing, perform maintenance checks on Aircraft 328 during a phase inspection at the Vermont Air National Guard Base, August 1, 2018. Aircraft 328 was the last F-16 to undergo a phase inspection as the unit transitions to the F-35 Lightning II in fall of 2019. (U.S. Air National Guard photo by 2nd. Lt. Chelsea Clark)