Airmen from the 28th Maintenance Squadron perform maintenance on a B-1 bomber prior to take-off at Ellsworth Air Force Base, S.D., Jan. 7, 2015. Airmen from the 28th MXS work throughout various weather conditions yearlong to keep all B-1s on Ellsworth mission ready. (U.S. Air Force photo by Airman 1st Class Rebecca Imwalle/Released)