The 'Clean' Spy In The Sky: Boeing Unveils Hydrogen-Powered Surveillance Drone Which Can Stay Airborne For Days -- Daily Mail
A new Boeing unmanned drone that is designed to stay airborne for days has completed its first autonomous flight at Edwards Air Force Base.
The 28-minute flight of the Phantom Eye began at 6:22 a.m. Friday and the aircraft reached an altitude of 4,080 feet (1,244 meters) and a cruising speed of 62 knots (114 kph) before landing at the California desert base.
When the drone touched down, it damaged its landing gear, but Boeing Phantom Works President hailed the flight as beginning 'a new era' of intelligence, surveillance and reconnaissance.
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Update: Video: First Test Flight for Military’s Mega-Drone -- Danger Room
My Comment: A sign of things to come.