ELLSWORTH AIR FORCE BASE, S.D. -- Senior Airman Caleb Christian, 28th Maintenance Squadron repair and reclamation journeyman, prepares to inflate a B-1B Lancer tire, March 24. The main tires on a B-1 are inflated to 260 pounds per square inch. (U.S. Air Force photo/Airman 1st Class Joshua J. Seybert)