Master Sgt. Krystoffer Miller, 325th Security Forces Squadron operations support superintendent, uses a control pad to operate a Quad-legged Unmanned Ground Vehicle at Tyndall Air Force Base, Fla., March 24, 2021. Designed by Ghost Robotics, the prototypes offer both semi-autonomous and user-operated modes (U.S. Air Force photo by Airman 1st Class Anabel Del Valle)