Supersecret US Spacecraft ID'd as Spy 'Satellite'

(May 25) -- The Air Force has gone to great pains to keep under wraps the true purpose of its X-37B Orbital Test Vehicle, an unmanned space plane it launched into orbit last month. But now a group of amateur sky watchers claims to have discovered the secret spacecraft's true purpose: as a spy plane that can capture images of the Earth below.

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