Daily Mail: Back with a bang! Top secret Air Force X-37B lands with a sonic boom after spending two YEARS in space... but they still won't say what it was doing up there!
* The reusable X-37B Orbital Test Vehicle returned after nearly two years in orbit
* Its landing marked the conclusion of its fourth classified mission in space
* Officials said the X-37B is the 'newest and most advanced' re-entry spacecraft
An unmanned military space plane landed at Kennedy Space Center Sunday with a sonic boom.
The reusable X-37B Orbital Test Vehicle's (OTV-4) return concluded an almost two-year mission in orbit, according to the US Air Force.
The Air Force tweeted shortly after 8am that the vehicle had landed safely, marking the conclusion of its fourth classified mission, which lasted more than 700 days.
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More News On The U.S. Air Force's X-37B Space Plane Landing After Spending 2 Years In Space On A Secret Mission
US military's secret space plane lands with sonic boom in Florida -- The Guardian
Military orbiter's landing rattles Florida with sonic boom -- AP
Air Force's X-37B Space Plane Lands in Florida After Record-Breaking Secret Mission -- Space.com
Air Force's space plane lands with a boom in Florida -- UPI
Air Force's mysterious space plane lands, wakes up Florida -- CNN
Newest Secret US Spacecraft Returns to Earth After Over 700 Days in Space -- Sputnik