The military's shuttle X-37-B Orbital Test Vehicle landed back on Earth this week. What has it been doing in space all this time? Trace investigates. Read More: Military Mini-Shuttle Completes Secret Mission: Slide Show http://news.discovery.com/space/history-of-space/slide-show-military-mini-shuttle-landing-california.htm "On April 22, the U.S. Air Force launched a mini unmanned shuttle called the Orbital Test Vehicle, also known as the X-37B." Secret Military Mini-Shuttle Marks 500 Days in Orbit http://news.discovery.com/space/private-spaceflight/top-secret-military-mini-shuttle-marks-500-days-in-orbit-140424.htm "A robotic miniature space shuttle on a classified mission for the U.S. Air Force marked its 500th day in orbit on Friday, with no word about when and where the space plane will land." X-37B Orbital Test Vehicle http://www.af.mil/AboutUs/FactSheets/Display/tabid/224/Article/104539/x-37b-orbital-test-vehicle.aspx "The X-37B Orbital Test Vehicle, or OTV, is an experimental test program to demonstrate technologies for a reliable, reusable, unmanned space test platform for the U.S. Air Force." Preparations Underway For X-37B Landing http://www.vandenberg.af.mil/mediacenter/pressreleasearchive/story.asp?id=123428053 "Preparations for the third landing of the X-37B, the Air Force's unmanned, reusable space plane, are underway at Vandenberg Air Force Base." X-37B: The Air Force's Mysterious Space Plane http://www.space.com/25275-x37b-space-plane.html "The U.S. Air Force's unmanned X-37B space plane has flown three clandestine missions to date, carrying secret payloads on long-duration flights in Earth orbit." Air Force's Secret X-37B Space Plane Launches on Third Mission http://www.universetoday.com/98937/air-forces-secret-x-37b-space-plane-launches-on-third-mission/ "An Atlas V rocket launched from Cape Canaveral Air Force Station today, carrying the Air Force's X-37B space plane into orbit on its third classified mission." Secretive X-37B Military Space Plane Could Land in California Tuesday http://www.space.com/27411-x37b-military-space-plane-landing.html "The U.S. Air Force's mysterious X-37B space plane will return to Earth this week -possibly as early as Tuesday - after 22 months in orbit on a secret mission." 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 http://www.extremetech.com/extreme/181426-us-militarys-mysterious-x-37b-space-plane-passes-500-days-in-orbit-but-we-still-have-no-clue-what-its-actually-doing-up-there "For just over 500 days, the US Air Force's mysterious X-37B OTV-3 robotic space plane has been casually orbiting the Earth." 3 Theories About the Air Force's Mystery Space Plane, X-37B http://www.popularmechanics.com/technology/aviation/military/3-theories-about-the-air-forces-mystery-space-plane-x-37b-8521517 "The U.S. Air Force is planning another flight of its mysterious X-37B spaceplane, but still won't say what it's doing up there. Here, we examine three theories about the X-37B's purpose." Declassified footage shows 1st ever nuclear explosion... in space! http://www.blastr.com/2012/09/declassified_footage_show.php "We know what kind of damage a nuclear bomb can do on Earth-but what about space?" Nuclear Weapon Effects In Space http://history.nasa.gov/conghand/nuclear.htm "In addition to the natural radiation dangers which will confront the space traveler, we must also consider manmade perils which may exist during time of war." ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube http://testtube.com/dnews Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel DNews on Twitter http://twitter.com/dnews Trace Dominguez on Twitter https://twitter.com/tracedominguez Tara Long on Twitter https://twitter.com/TaraLongest DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ http://gplus.to/dnews Discovery News http://discoverynews.com Download the TestTube App: http://testu.be/1ndmmMq