Lt. Gen. Dorothy Hogg, Air Force Surgeon General, talks with a U.S. Navy sailor during a tour of the Air Force’s first Invisible Wounds Center Aug. 30 at the Eglin Air Force Base, Fla. The IWC will serve as a regional treatment center for post-traumatic stress, traumatic brain injury, associated pain conditions and psychological injuries. (U.S. Air Force photo/Ilka Cole)