Staff Sgts. Brien Oxford, in blue gear, and Jeremy Graves, in red gear, practice Krav Maga techniques on Charleston AFB Oct. 8. Security Forces Ravens fly with aircraft to maintain security when the aircraft are going to be landing in areas where the security level is unknown or additional security is needed. Sergeants Oxford and Graves are Ravens with the 437th Security Forces Squadron. (U.S. Air Force photo/Airman 1st Class Katie Gieratz)