ELLSWORTH AIR FORCE BASE, S.D. -- Airman 1st Class Matthew Bartley, 28th Aircraft Maintenance Squadron crew chief, closes an engine compartment door on the B-1B Lancer, Oct. 28. Ellsworth Airmen endure freezing temperatures and severe wind while working on the B-1. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)