Letter to the Airmen performing nuclear deterrence operations for the Air Force Published April 4, 2011 By to AFGSC Public Affairs BARKSDALE AIR FORCE BASE, La. -- Secretary of the Air Force Michael B. Donley and Gen. Norton A. Schwartz, Chief of the Staff of the Air Force, recently sent a letter to all Airmen performing nuclear deterrence operations for the Air Force. To read the letter, click HERE.