n this mage released by British defence company QinetiQ, a solar-powered aircraft which has broken the world record for longest unmanned flight, sailing for 54 hours more than 50,000 feet (15,240 meters) above the New Mexico desert, the company claimed. QinetiQ's ultra-thin "Zephyr" plane nearly doubled the current record, which stood at 30 hours, 24 minutes in a flight on July 23, 2007
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