Captain Eric Poland, a 34th Bomb Squadron B-1B Lancer pilot, reviews a pre-flight checklist as part of exercise Combat Raider 21 at Ellsworth Air Force Base, S.D., July 20, 2021. Combat Raider is designed to train aircrew on realistic scenarios that support a full range of operations against modern threats and replicate modern day contingency operations. (U.S. Air Force photo by Airman 1st Class Quentin K. Marx)
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