10 years ago
Mysterious US military plane returns to Earth
An unmanned US plane on a top-secret, two-year mission to space has returned to Earth and landed in California. The aircraft, resembling a miniature space shuttle and known as the Orbital Test Vehicle or X-37B, spent 674 days in orbit around the planet. It was the unmanned plane's third space flight, but its mission has been shrouded in mystery.
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