Maj. Byron W. Duke, an executive officer from Granbury, Texas, practices using a rear choke with figure-four variation on Lance Cpl. Christopher A. Barroso, a logistics clerk from Roosevelt, N.Y., during a Marine Corps Martial Arts Program gray-belt class at Camp Korean Village, Iraq, Nov. 7. Both Marines are with 2nd Battalion, 25th Marine Regiment, Regimental Combat Team 5. Marines in the battalion are working on earning their MCMAP gray belt.::r::::n:: - Maj. Byron W. Duke, an executive officer from Granbury, Texas, practices using a rear choke with figure-four variation on Lance Cpl. Christopher A. Barroso, a logistics clerk from Roosevelt, N.Y., during a Marine Corps Martial Arts Program gray-belt class at Camp Korean Village, Iraq, Nov. 7. Both Marines are with 2nd Battalion, 25th Marine Regiment, Regimental Combat Team 5. Marines in the battalion are working on earning their MCMAP gray belt.::r::::n::