U.S. Air Force 2nd Lt. David Feibus, from Wright-Patterson Air Force Base, Ohio, fly's one his teams DJI S1000 drone during the setup and calibration phase of the event at the Nevada National Security Site, Las Vegas, NV., Dec. 9, 2016. This year teams were given the challenge of solving issues revolving around drones, and are demonstrating their solutions to judges. (U.S. Air Force photo by Wesley Farnsworth)