Retired Gen. Raymond Johns Jr. speaks to members of the 507th and Oklahoma Air National Guard 137th Air Refueling Wings during a visit to Tinker Air Force Base on Aug. 20, 2013. Johns, a former Air Mobility Command commander, is part of the National Commission on the Structure of the Air Force. The commission is traveling to several bases across the United States to speak with Air Force Reserve, Air National Guard and active-duty members about future force structure. The commission held several question and answer segments to get the perspective from the ground level. (U.S. Air Force photo/Senior Airman Mark Hybers)