World's First Six-Gen Bomber Completes Aerial Refueling Test Flight

World's First Six-Gen Bomber Completes Aerial Refueling Test Flight Northrop Grumman released new images of its B-21 Raider stealth bomber performing "more advanced stages of flight test" and "aerial refueling." Northrop Grumman’s B-21 Raider continues to demonstrate outstanding performance as the program moves into more advanced phases flight test, including aerial refueling. (Photo Credit: U.S. Air Force) The B-21 is the world's first sixth-generation aircraft and the "most adva...