Mixed martial arts fighters Gray Maynard and Tom Lawlor demonstrate the counter to a take-down during the “For the Leathernecks IV” mixed martial arts clinic at the Semper Fit Center, July 10, 2015. Headquarters Marine Corps Single Marine Program and the Single Marine & Sailor Program at Marine Corps Base Hawaii hosted a clinic featuring professional fighters Lawlor, Maynard and Mark Munoz. The fighters taught Marines and Sailors various defensive grappling techniques. (U.S. Marine Corps photo by Kristen Wong/Released) - Mixed martial arts fighters Gray Maynard and Tom Lawlor demonstrate the counter to a take-down during the “For the Leathernecks IV” mixed martial arts clinic at the Semper Fit Center, July 10, 2015. Headquarters Marine Corps Single Marine Program and the Single Marine & Sailor Program at Marine Corps Base Hawaii hosted a clinic featuring professional fighters Lawlor, Maynard and Mark Munoz. The fighters taught Marines and Sailors various defensive grappling techniques. (U.S. Marine Corps photo by Kristen Wong/Released)