U.S. Air Force Command Chief Master Sgt. Martin S. Klukas, Air Combat Command, cheers during the singing of the Air Force song prior to the arrival of President Barack Obama at Langley Air Force Base, Va., Oct. 19, 2011. The president and first lady’s comments focused on the amazing abilities American veterans have to offer the civilian workforce. (U.S. Air Force photo by Tech. Sgt. Christina M. Styer/Released)