'First class' Ravens Published Oct. 12, 2005 Airmen, Sailors and Soldiers who are students in the 421st Combat Training Squadron's Raven Class 06-1 march along a roadway here as part of their training. The class -- the first of the new fiscal year here -- is comprised of Air Force security forces, Army military police, and Navy masters-at-arms. They learn about aircraft security, defensive tactics, and air base ground defense. (Photo by Tech. Sgt. Scott T. Sturkol)