ELLSWORTH AIR FORCE BASE, S.D. -- Airman 1st Class Max Nelson, 28th Maintenance Squadron repair and reclamation apprentice, tightens bolts on a B-1B Lancer tire, March 24. On average, it takes approximately 40-minutes to completely tear down and rebuild a tire. (U.S. Air Force photo/Airman 1st Class Joshua J. Seybert)