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Martial arts instructor students Sgt. Marquis Jones, right, and Sgt. Frederick Graham, fight in a weapons-free sparring match under the watchful eye of Sgt. James M. Ahearn, martial arts instructor trainer, during a Martial Arts Instructor Course aboard Marine Corps Logistics Base Albany, May 24. - Martial arts instructor students Sgt. Marquis Jones, right, and Sgt. Frederick Graham, fight in a weapons-free sparring match under the watchful eye of Sgt. James M. Ahearn, martial arts instructor trainer, during a Martial Arts Instructor Course aboard Marine Corps Logistics Base Albany, May 24.