Senior Airman Melissa Goodhile, 47th Security Forces Squadron military working dog handler, finalizes an "arm bar" on Staff Sgt. Lacy Ruiz, 47th SFS combat arms instructor, in Losano Fitness Center on Laughlin Air Force Base, Texas, July 10, 2015. The straight arm bar is a six-step, joint lock process designed to damage the elbow by trapping the bicep and triceps region between the submissor's leg. (U.S. Air Force photo by Tech Sgt. Steven R. Doty/Released)