ELLSWORTH AIR FORCE BASE, S.D. -- A B-1B Lancer sits on the flightline, Oct. 15. The B-1 can rapidly deliver massive quantities of precision and nonprecision weapons against any adversary, anywhere in the world. (U.S. Air Force photo/Airman 1st Class Corey Hook)

ELLSWORTH AIR FORCE BASE, S.D. -- A B-1B Lancer sits on the flightline, Oct. 15. The B-1 can rapidly deliver massive quantities of precision and non-precision weapons against any adversary, anywhere in the world. (U.S. Air Force photo/Airman 1st Class Corey Hook)

ELLSWORTH AIR FORCE BASE, S.D. -- Ellsworth pilots and weapons system officers arrive at a B-1B Lancer for takeoff, Oct. 15. The aircraft is operated by a four-man crew, which includes the pilot, co-pilot, defensive systems operator and offensive systems operator. (U.S. Air Force photo/Airman 1st Class Corey Hook)

ELLSWORTH AIR FORCE BASE, S.D. -- Ellsworth pilots and weapons system officers talk with crew chiefs during a preflight check, Oct. 15. The crew chiefs, pilots and weapons system officers discuss recent maintenance on the jet. (U.S. Air Force photo/Airman 1st Class Corey Hook)

ELLSWORTH AIR FORCE BASE, S.D. -- Capt. Nick Brooks, 34th Bomb Squadron B-1B Lancer weapons systems officer, boards a B-1B Lancer, Oct. 15. As a weapons systems officer, Captain Brooks works with the pilots and other weapons systems officers to collectively achieve and maintain crew efficiency, situational awareness and mission effectiveness. (U.S. Air Force photo/Airman 1st Class Corey Hook)

ELLSWORTH AIR FORCE BASE, S.D. -- Capt. Kaylene Giri, 34th Bomb Squadron B-1B Lancer weapons systems officer instructor, proceeds through a weapons system preflight checklist, Oct. 15. As a weapons systems officer, Captain Giri works with the pilots and other weapons systems officers to collectively achieve and maintain crew efficiency, situational awareness and mission effectiveness. (U.S. Air Force photo/Airman 1st Class Corey Hook)

ELLSWORTH AIR FORCE BASE, S.D. -- Lt. Col. Jason Combs, 28th Bomb Wing director of staff, works his way through preflight checklists from the cockpit of a B-1B Lancer, Oct. 15. The pilot performs preflight checks to ensure all systems are functioning before every mission. (U.S. Air Force photo/Airman 1st Class Corey Hook)