Boeing Phantom Eye, military fixed-wing drone, The Boeing Company, Chicago, Illinois, USA

Boeing's Phantom Eye is an unmanned airborne vehicle (UAV) that serves as an eye in the sky for surveillance, disaster relief, search and rescue, and a multitude of other uses. Program manager Drew Mallow talks about the innovations that made it possible.

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Boeing's unmanned aircraft, Phantom Eye, completed its first take off and landing June 1. The autonomous aircraft, with its 150-foot wingspan and powered by energy-efficient liquid hydrogen, lifted off its launch cart and climbed to an altitude of 4,080 feet into the desert sky above Edwards Air Force Base, Calif.

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See Boeing's Phantom Eye, the liquid-hydrogen powered unmanned airborne system, take to the skies for its second flight at NASA's Dryden Flight Research Center at Edwards Air Force Base, Calif. The flight, which took place on Feb. 25, lasted 66 minutes, reaching an altitude of more than 8,000 feet and a speed of 62 knots.

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