Airmen carry their bags onto a bus as they complete their portion of a Phase I Operational Readiness Exercise at Ellsworth Air Force Base, S.D., June 21, 2011. A portion of the ORE tested team Ellsworth’s ability to process through a simulated deployment line. (U.S. Air Force photo/Airman Alystria Maurer/Released) Photos: Ellsworth participates in Phase I ORE from 28th Bomb Wing Public Affairs 7/11/2011 - ELLSWORTH AIR FORCE BASE, S.D. -- Airmen from the 28th Bomb Wing participated in a Phase I Operational Readiness Exercise to test Ellsworth Air Force Base's preparation and mobilization from peacetime readiness into a wartime posture on short notice, June 20 through 22. View the slideshow.