EGLIN AIR FORCE BASE, Fla. -- Dr. Charles Merkel, 53rd Wing historian, endures Combat Skills Training before deploying to Kandahar, Afghanistan, in September to "fill in" as historian for the 451st Expeditionary Wing for approximately five months. The "Doc" is a retired Army major with 20 years of military service who also served in the Vietnam War. The historian said knows what to expect being a member of a military unit deployed overseas. (Air Force photo by Airman Anthony Jennings)