That's "yours truly" (without the helmet) as we were about to embark on a patrol into the Mekong Delta to retrieve a truck that had been ambushed by the Viet Cong and all passengers killed. These are machine-gun jeeps ... note also the sandbags on all vehicles (some protection against mines)... and the wire cutters on the front of each jeep (the perpendicular attachment to the front bumber) designed to cut any wires strung across the roadway which were, obviously, intended to decapitate the driver and passenger. As you can see, I kept my head (for whatever that's worth) ...