STAFF SGT. Vernon Wells, a technician at the Armstrong Aerospace Medical Research Laboratory, sits in an aircraft simulator wearing the Visually Coupled Airborne System Simulator (VCASS). The VCASS allows a pilot to fly a plane by moving his hand in the air, select weapons by looking at the device that controls access to them, arm them with a turn of his head, and fire them by using voice commands; all without looking outside the cockpit or pushing a button