Air Force's Secret Space Plane Is About to Launch Again with Even More Payloads

The U.S. Air Force's experimental unmanned space plane is about to take off again, this time with a new attachment near its tail to hold more payloads.

Air Force Secretary Barbara Barrett announced Wednesday that the X-37B Orbital Test Vehicle (OTV) will take off May 16 from Cape Canaveral Air Force Station, Florida, for its sixth mission, which will incorporate tasks for U.S. Space Force and NASA, among other agencies.

"This important mission will host more experiments than any prior X-37B flight, including two NASA experiments," she told viewers during a conference hosted by the Space Foundation.