7 and 7 is
British photographer Larry Burrows took a harrowing series of photos on an assignment called "Route Nine Defensive," undated in the LIFE archive. It appears to show Operation Pegasus, the combined operation by U.S. Marines and Air Cavalry in April 1968 to reopen the road from the coast to the Marine base at Khe Sanh, which had been under siege and supplied by air for several months. Willys M274 Mechanical Mule in the background.
Staghound Mk I The T17E1 was armed with a 37 mm M6 gun, a coaxial .30 cal Browning 1919A4 machine gun and a 2-inch smoke mortar in a rotating turret. In the hull was mounted a .30 cal Browning 1919A4 machine gun. Some T17E1 had an additional .30 Browning 1919A4 cal machine gun for anti-aircraft defense.