U.S. Air Force Airmen listen attentively as U.S. Air Force Chief of Staff Gen. Mark A. Welsh III thanks them for their service during an all-call Dec. 15, 2014 at Bagram Airfield, Afghanistan. The all-call included a Q-and-A session with the general fielding questions from Airmen about what was on their minds. (U.S. Air Force photo by Staff Sgt. Whitney Amstutz/released)