The Doc flight crew pose for a photo with U.S. Air Force Brig. Gen. Paul Tibbets IV, Air Force Global Strike Command vice commander, inside Doc also known as the B-29 Superfortress, June 9, 2017, at Whiteman Air Force Base, Missouri. One of the crew members is Donnie Obreiter, 97th Maintenance Directorate KC-46 flight chief, who uses his spare time to help maintain historic aircrafts. (Courtesy photo by Donnie Obreiter)