Top Secret US Air Force Spaceship Breaks Own Record On Mysterious 719-Day Mission

The ultra-top-secret US Air Force X-37B spaceplane has broken the record for the longest time in space for a terrestrial aircraft, with an immense 717 days and counting.
Built by Boeing, the 29-feet long and 9.6-feet high craft has been shrouded in mystery and speculation since its first mission in 2010.

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