U.S. Air Force Staff Sgt. Chris Rundell, Heating Ventilation and Air Conditioning (HVAC) craftsmen assigned to the 633rd Civil Engineer Squadron, removes a panel from an HVAC system at Langley Air Force Base, Va., Jan. 5, 2016. Rundell assisted with the completion of three different HVAC system work orders in the first half of his day. (U.S. Air Force by Staff Sgt. J.D. Strong II)