The landing of an unmanned military space plane at Kennedy Space Center Sunday morning concluded an almost two-year mission in orbit, according to the U.S. Air Force.
The Air Force tweeted shortly after 8 a.m. that the reusable X-37B Orbital Test Vehicle had landed safely, completing its fourth classified mission.
OTV-4 launched from Cape Canaveral on a United Launch Alliance Atlas V rocket on May 20, 2015.
Air Force officials have called the X-37B program, which is managed by the Air Force Rapid Capabilities Office, “the newest and most advanced re-entry spacecraft.”
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