Several F-35A Lightning II aircraft arrived here as part of a Theater Security Package. For one pilot, the Spangdahlem flightline was familiar territory. U.S. Air Force Maj. Michael Slotten, 421st Fighter Squadron F-35A pilot, who was stationed here in 2004 as an Airman first class fuels distributor operator, visited his old unit and became requalified to refuel aircraft July 11.