Master Gunnery Sgt. James Gominsky, the Marine Corps Embassy Security Group operations chief, instructs detachment commander students with MCESG on how to properly fire a Mark 18 rifle in the prone position during a familiarization fire at the MCESG range on Marine Corps Base Quantico, VA., July 18, 2023. The students must undergo the Diplomatic Security qualification course of fire as a requirement for them to graduate and become detachment commanders. (U.S. Marine Corps photo by Sgt. Ramon Garcia)