U.S. Air Force Senior Airman Gregory Gilkes, from the New Jersey Air National Guard's 177th Fighter Wing in Egg Harbor Township, N.J., inspects the hinges and latches on a light cart while performing preventative maintenance March 17, 2015. Gilkes, who works in the Aerospace Ground Equipment shop, uses a checklist to make sure that everything on the light cart is checked thoroughly before signing off on it. (U.S. Air National Guard photo by Airman 1st Class Amber Powell/Released)