Capt. Alex Arntz, standard and evaluation program manager with the 315th Operational Support Squadron here, at left, Cadet Oliver Smith with Air Force ROTC at Clemson University, middle, and Senior Airman Justin Lacefield, aerospace propulsion specialist with the 437th Aircraft Maintenance Squadron, right, earned the top three awards in the Paper Wings airtime competition sponsored by Red Bull April 13, 2019 at Joint Base Charleston, S.C. The winner, Smith, built a plane that had a hang time of 5.69 seconds. (U.S. Air Force photo by Airman 1st Class William Brugge)