Control Instructor A joint terminal attack control instructor plays the role of a ground commander during a close air support training scenario at Nellis Air Force Base, April 29, 2015. Nellis AFB will serve as a test bed for 5G technology related to command and control. SHARE IMAGE: Download Image: Full Size (1.17 MB) Photo By: Air Force Senior Airman Joshua Kleinholz VIRIN: 150429-F-MF020-044C.JPG Photo Gallery