USA-226 - Wikipedia
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X-37B: The Air Force's Mysterious Space Plane | Space
X-37B secret spaceplane returns after record-breaking flight
File:X-37B orbital test vehicle landing.jpg - Wikimedia Commons
File:The X-37B OTV is inspected after landing at Vandenberg Air Force Base, California.jpg - Wikipedia
China Space Plane launched! Is China overtaking the US, or it is just an X-37B copy? - YouTube
Secret Mini Space Shuttle Could Launch April 19 - Universe Today
X-20 Dyna-Soar Spaceplane Was Decades Ahead of Its Time | Defense Media Network
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US military launches secret space plane X-37B - China.org.cn
Boeing X-37 - Wikipedia
Boeing X-37 - Wikipedia
File:X-37B orbital test vehicle landing-2.jpg - Wikimedia Commons
Boeing X-37 - Wikipedia
Boeing X-37 - Wikipedia
US military's mysterious X-37B space plane passes 500 days in orbit, but we still have no clue what it's actually doing up there | Extremetech
US Military's 'Most Secretive Craft' Has Been 'Flying Non-Stop' For Over Two Years & Has No Plans To Land
The U.S. Air Forces X-37B Space Plane has been orbiting the Earth for 719 consecutive days. What is it doing, and what is its mission goal? - Quora
X-37B Spaceplane To Test Power Beaming Technology | Hackaday
Boeing X-37B | Spacecraft Wiki | Fandom
US Space Force's X-37B spaceplane returns to Florida after over 900-day mission : r/space
X-37B after landing photos. – sUAS News – The Business of Drones
File:X-37B OTV4 landed at Kennedy Space Center (170507-F-LD992-006).jpg - Wikimedia Commons
