A massive experimental drone designed by Boeing Co. engineers to fly for up to four days at a time completed its first test flight above the Mojave Desert at Edwards Air Force Base.
The drone, called Phantom Eye, and its hydrogen-fueled propulsion system have the potential to vastly expand the reach of military spy craft. The longest that reconnaissance planes can stay in the air now is about 30 hours.
The Phantom Eye, Boeing’s unmanned aerial vehicle, made its first… (Bob Ferguson / Boeing Co. )