U.S. Air Force Col. Robin Fontenot, 18th Dental Squadron commander, dons a headlamp before entering a cave that was used by Japanese troops during the Battle of Iwo Jima. Members of the 18th Medical Group hosted a professional development outing to Iwo To, Japan, March 18, 2013. (U.S. Air Force photo/Tech Sgt. Jocelyn L. Rich-Pendracki)