U.S. Air Force Capt. Derek Oakley, left, and Maj. Chris Lovegren, both pilots assigned to the 34th Bomb Squadron, conduct preflight checklists in the cockpit of a B-1B Lancer aircraft prior to taking off from Ellsworth Air Force Base, S.D., Nov. 24, 2009. Oakley is participating in the flight to obtain his aircraft commander certification. (DoD photo by Airman 1st Class Corey Hook, U.S. Air Force/Released)