(Image credit: U.S. Air Force).
Two robotic X-37B spaceplans have been secretly flying missions since 2010, and are part of the U.S. Space Force's mini-fleet.
OTV-6 was launched in May 2020. It is currently being worked on. It's the sixth flight of the robotic X-37B (also known as OTV) and is the sixth in the series. The five other OTV missions were launched in April 2010, March 2011, Dec 2012, May 2015, September 2017 and September 2017.
Here are 10 facts about the military spaceplane. Click the arrows below to jump to the next page.
