11/24/2009 - ELLSWORTH AIR FORCE BASE, S.D. – (Left) Capt. Derek Oakley and Maj. Chris Lovegren, 34th Bomb Squadron pilots, work their way through preflight checklists from the cockpit of a B-1B Lancer before takeoff Nov. 23. This flight is Captain Oakley's aircraft commander certification flight. (U.S. Air Force photo/Airman 1st Class Corey Hook)

11/24/2009 - ELLSWORTH AIR FORCE BASE, S.D. – Capt. Dennis Bone, 34th Bomb Squadron B-1B Lancer weapons systems officer, proceeds through a weapons system preflight checklist Nov. 23. As a weapons systems officer, Captain Bone integrates with the pilot to collectively achieve and maintain crew efficiency, situational awareness and mission effectiveness. (U.S. Air Force photo/Airman 1st Class Corey Hook)

11/24/2009 - ELLSWORTH AIR FORCE BASE, S.D. – B-1B Lancers sit on the flightline Nov. 23. 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)

11/24/2009 - ELLSWORTH AIR FORCE BASE, S.D. – Maj. Chris Lovegren, 34th Bomb Squadron pilot, operates the Beyond Line of Sight system of a B-1B Lancer during his preflight checklist Nov. 23. The BLOS system is capable of providing a variety of information including high-resolution terrain mapping. (U.S. Air Force photo/Airman 1st Class Corey Hook)