NASA’s X-37B

One doesn’t typically think of spacecraft as UAS, but they are.  Most are one way, but an X-37B just returned to earth after two years in space.

The Boeing X 37B, an unmanned space orbiter that looks like a small version of the space shuttle, returned from a 718 day secret space mission that began back in May 2015.  It apparently created a sonic boom as it came into Cape Canaveral for a landing.  It is launched using United Launch Alliance’s Atlas 5 rocket.