Secret mission accomplished: America's mysterious space plane to land after a YEAR in orbit

MailOnlineBy Rob Waugh

The U.S Air Force’s highly secret unmanned space plane will land in June - ending a year-long mission in orbit.

The experimental Boeing X37-B has been circling Earth at 17,000 miles per hour and was due to land in California in December. It is now expected to land in mid to late June.

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