On May 8, 1970, construction workers violently clashed with students demonstrating against the Vietnam War in lower Manhattan. The workmen, who came to be known as “hardhats,” were at the cutting edge of a new kind of class war. With the war in Vietnam raging on, it was the sons of the working class who were doing most of the fighting. Workmen saw the protesting students as privileged “draft dodgers” disparaging the country and those who fought for it. On the other side, many student activists s...