By The U.S. Air Force’s X-37B reusable spaceplane returned to Earth May 7 after spending almost two years in space, its longest mission ever.The Boeing [BA]-built orbital test vehicle landed on a runway at NASA’s Kennedy Space Center in Florida, completing the secretive program’s fourth mission, which lasted 718 days.“We are incredibly pleased with the performance of the space vehicle and are excited about the data gathered to support the scientific and space communities,” said Lt. Col. Ron Fehlen, the Air Force’s X-37B program…
Air Force’s X-37B Spaceplane Finishes Two-Year Trip
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