Shelly Ponce of Team Viper Brazillian Jiu-jitsu demonstrates to students how to maneuver into an arm bar, using 1st. Lt. Lemuel Bethune of the 9th Airlift Squadron as her victim May 31, 2012, at Dover Air Force Base, Del. Team Dover members learned self-defense techniques in demonstrations put on by Team Viper members. (U.S. Air Force photo by Tech. Sgt. Chuck Walker)