Petty Officer 2nd Class Daniel Bentley, Naval Munitions Command Charleston mineman, adjusts the fin assembly on an Mk-62 Quickstrike mine at Ellsworth Air Force Base, S.D. June 2, 2014. The B-1B Lancer pilots dropped the mines at an altitude of about 1,000 feet while moving at more than 500 kilometers an hour as part of a joint exercise with Ellsworth Airmen designed to enhance air and sea capabilities. (U.S. Air Force photo by Senior Airman Anania Tekurio/Released)