A crew chief assigned to the 28th Aircraft Maintenance Squadron communicates with the crew before a B-1B Lancer from Ellsworth Air Force Base, S.D., takes off on Oct. 24, 2019. The B-1 can rapidly deliver massive quantities of precision and non-precision weapons against any adversary. United States Strategic Command forces are on watch 24 hours a day, seven days a week to deter and detect strategic attack against the U.S. and our allies. (U.S. Air Force photo by Senior Airman Nicolas Z. Erwin)