U.S. Marine Corps Master Sgt. Thomas Draffen is promoted to the rank of Master Gunnery Sergeant at Marine Corps Air Station Yuma, Ariz., April 1, 2015. Master Gunnery Sgt. Draffen was promoted by retired Master Gunnery Sgt. Michael Arnett, his drill instructor, after 20 years of faithful service. (U.S. Marine Corps photo by Cpl. Xzavior T. McNeal, MAWTS-1 COMCAM/Released) - U.S. Marine Corps Master Sgt. Thomas Draffen is promoted to the rank of Master Gunnery Sergeant at Marine Corps Air Station Yuma, Ariz., April 1, 2015. Master Gunnery Sgt. Draffen was promoted by retired Master Gunnery Sgt. Michael Arnett, his drill instructor, after 20 years of faithful service. (U.S. Marine Corps photo by Cpl. Xzavior T. McNeal, MAWTS-1 COMCAM/Released)