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Secret US space plane lands after spending two years in orbit
A mysterious US Air Force unmanned aircraft is landing after 22 months of orbiting the Earth amid speculations that it is sent for spying or military mission
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Secret Spaceplane, Mystery Mission
The Air Force’s secret space plane has been up in orbit for nearly 500 days—a space endurance record. But nearly a year and a half into the mission, the Pentagon still won’t say what
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