In 1998, Tibbets IV, flew Fifi with his grandfather, retired Brig. Taking control of the aircraft means he has now flown the only two currently operational B-29s, Doc and Fifi. Paul Tibbets IV, 509th Bomb Wing commander. Wichita’s beloved B-29 Superfortress, Doc, took to the skies yet again June 9, from McConnell Air Force Base, this time with an added aspect of historical significance and Air Force heritage.