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Unmanned naval attack jet moves closer to take-off

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June 15 - The US Navy's first sea-based, unmanned attack aircraft has taken a major step towards production with the successful completion of flight testing at Edwards Air Force Base in California. The Northrop Grumman X-47 B has been designed for use at sea as a carrier-based plane, a new and highly sophisticated weapon in aerial warfare. Rob Muir reports.

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