Gunnery Sgt. Antonio Lopez, the outgoing course chief with 343rd Training Squadron out of Lackland Air Force Base, Texas, explains a portion of the class’ practical application lesson during the Traffic Collision Investigation Course aboard Marine Corps Air Station Miramar, Calif., Sept. 11. This is the third successive course and the final one to be held in the Marine Corps. The course began in Camp Foster, Okinawa, Japan, then moved to Marine Corps Base Camp Lejeune, N.C., before making its final stop at the air station. - Gunnery Sgt. Antonio Lopez, the outgoing course chief with 343rd Training Squadron out of Lackland Air Force Base, Texas, explains a portion of the class’ practical application lesson during the Traffic Collision Investigation Course aboard Marine Corps Air Station Miramar, Calif., Sept. 11. This is the third successive course and the final one to be held in the Marine Corps. The course began in Camp Foster, Okinawa, Japan, then moved to Marine Corps Base Camp Lejeune, N.C., before making its final stop at the air station.