Boeing Bills Its Massive Hydrogen-Powered Drone as a Flying Cell Tower: One of the biggest drones ever built isn't going to kill you. Its manufacturer wants it to act as a communications relay station -- 60,000 feet in the air.
Boeing Bills Its Massive Hydrogen-Powered Drone as a Flying Cell Tower: One of the biggest drones ever built isn't going to kill you. Its manufacturer wants it to act as a communications relay station -- 60,000 feet in the air.