From Air Force Col. Nick Hague, who is currently aboard the International Space Station, all the way back to Buzz Aldrin, who was a U.S. Air Force fighter pilot in the Korean War, Airmen are among the more than 60% of astronauts who came from the uniformed service.

https://www.af.mil/News/Article-Display/Article/1910228/aiming-higher-airmen-contribute-to-human-spaceflight-from-apollo-to-tomorrow/ Air Force Space Command Public Affairs