Stealth Bomber turns 25 today Published July 17, 2014 By 412th Test Wing Public Affairs PALMDALE, Calif. -- A B-2 Spirit from Whiteman Air Force Base, Mo., "The Spirit of Arizona," taxis after landing at U.S. Air Force Plant 42 in Palmdale July 17. A quarter of a century ago today, the B-2 Spirit made it's first flight from U.S. Air Force Plant 42 towards the skies over Edwards Air Force Base, July 17, 1989. Northrop Grumman and the Air Force celebrated the anniversary at Northrop's Palmdale Aircraft Integration Center of Excellence.