GIF made from US Air Force videos of the X-37B spaceplane landing at NASA ‘s Kennedy Space Center on May 7, 2017 (US Air Force)

The US Air Force’s secretive X-37B spaceplane landed yesterday after 718 days in orbit—just twelve days shy of a full two years. What was it doing up there in the sky? The government won’t say. Even the spaceplane’s budget is a secret. But the X-37B’s landing wasn’t so stealth. The spaceplane caused a sonic boom that woke up people living near NASA’s Kennedy Space Center in Florida.

The secret, reusable spaceplane is made by Boeing and is unmanned, allowing it to conduct extended missions, even if the public has no idea what those missions might be. This was the X-37B’s fourth mission (all secret, of course) and the spaceplane typically lands in California, not Florida. Again, we don’t know enough about the spaceplane’s purpose to speculate about why it landed in Florida and woke up the neighbors this time around.

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The spaceplane beat its own previous record of 674 days in orbit after landing in October of 2014. At that time the speculation was that the US Air Force was using the X-37B for some kind of surveillance of China’s space station.

Photo of the X-37B provided by the US Air Force after the spaceplane at NASA ‘s Kennedy Space Center on May 7, 2017 (US Air Force)

The X-37B Orbital Test Vehicle (OTV) has now spent an astonishing 2,085 cumulative days in orbit since its first mission in April of 2010. When the spaceplane first took off on its most recent mission on May 20, 2015, David Bowie, Leonard Cohen, and Prince were all still alive, and Donald Trump was still a month out from announcing his bid for president—something that was met with little more than jokes at the time.

Photo of the X-37B provided by the US Air Force after the spaceplane at NASA ‘s Kennedy Space Center on May 7, 2017 (US Air Force)

“The landing of OTV-4 marks another success for the X-37B program and the nation,” X-37B program manager Lt. Col. Ron Fehlen said in a statement without giving away the plot of this real-life mystery movie we seem to be living in.

“This mission once again set an on-orbit endurance record and marks the vehicle’s first landing in the state of Florida,” Fehlen continued. “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. We are extremely proud of the dedication and hard work by the entire team.”

“The hard work of the X-37B OTV team and the 45th Space Wing successfully demonstrated the flexibility and resolve necessary to continue the nation’s advancement in space,” Randy Walden, the director of the Air Force Rapid Capabilities Office, said in a statement. “The ability to land, refurbish, and launch from the same location further enhances the OTV’s ability to rapidly integrate and qualify new space technologies.”

The Air Force provided three videos of the landing, along with two photos. We’ve uploaded the three videos above for your viewing pleasure. As best I can tell, there’s no E.T. in sight.

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But it’s a good thing that this mini-shuttle is unmanned. If I’d left Earth in May of 2015 and had a two year mission I’m not sure I’d want to come back in 2017.

Update, 12:10pm: The US Air Force just released a few more photos of the X-37B on its way to a hangar at the Kennedy Space Center.

Image: US Air Force

And this one from behind:

Image: US Air Force

As for this one, I’m not sure these guys understand the whole “secret” part of their project:

Image: US Air Force