Air Force’s X-37B autonomous spaceplane has won the 2019 Collier Trophy, awarded annually by the National Aeronautic Association for American achievement in aviation and space, the NAA announced Aug.

The NAA said the X-37B won for “developing and employing the world’s only reusable, autonomous spaceplane, which logged more than 2,865 days in orbit across five missions, changing access to space and serving as the nation’s workhorse in space experimentation and technology.”.

The sixth mission of the X-37B spaceplane lifted off May 17, 2020, from Cape Canaveral Air Force Station in Florida.

“The X-37B advances reusable spaceplane technologies and operates experiments in space that are returned for further examination on Earth.”