Photo Credit: Senior Master Sgt. David H. Lipp, North Dakota Air National Guard
Master Sgt. Al Peterson signals to a Guardsman behind the wheel to cut the engine as he works in the North Dakota Army National Guard's Field Maintenance Shop No. 2 in Fargo, N.D., on Nov. 16, 2011. Peterson is completing his last weeks in the job as he prepares to retire at the end of the month. When he does, there will be no remaining Vietnam veterans in the North Dakota National Guard. Peterson served in the U.S. Navy during the war, including on the USS Kitty Hawk and at Tan Son Nhut Air Base outside of Da Nang.