A crew chief with the 9th Expeditionary Bomb Squadron conducts preflight inspections with B-1B Lancer aircrew prior to conducting a training mission during a Bomber Task Force deployment at Andersen Air Force Base, Guam, Oct. 29, 2020. Crew chiefs are tasked with ensuring the aircraft is mission ready by conducting day-to-day maintenance that includes diagnosing malfunctions, replacing components and detailed inspections. (U.S. Air Force photo by Staff Sgt. David Owsianka)