Beginning in 1963 the M72 LAW, short for light anti-armor weapon, gave soldiers and Marines a high-explosive rocket that could knock out tanks. But the M72, shouldered in this photo by a soldier in the 101st Airborne Division in 1966, was also able to penetrate up to 2 feet of concrete or 6 feet of soil and was used to destroy enemy bunkers more often than it was fired at tanks. However, its sensitive electrical system could succumb to corrosion or other ailments. In April 1972, South Vietnamese troops used LAWs to great effect against enemy T-54 and PT-76 tanks during urban battles. (Getty Images)