Greg Ulmer, vice president and general manager of the F-35 program, Lockheed Martin Aeronautics, speaks about the delivery of the F-35 Lightning II to the 158th Fighter Wing, during a welcome ceremony to celebrate the arrival of the aircraft to the wing, Vermont Air National Guard Base, South Burlington, Vt., Oct. 19, 2019. The 158th FW is the first Air National Guard unit to receive the Air Force's most recent fifth generation aircraft, having received two in September out of a total of 20 that will arrive over the following several months. (U.S. Air National Guard photo by Tech. Sgt. Ryan Campbell)