Wall Street [Union workers protest Mayor Lindsay’s reaction to the “Hard Hat Riot”], May 11, 1970. New York Police Department surveillance films, NYC Municipal Archives. The Hard Hat Riots took place when 200 unionized construction workers violently broke up a Kent State shooting solidarity rally held by college and high school students in downtown Manhattan. This film depicts one of the many parades construction workers held in the days afterward, showing their support for President Nixon and their ire for Mayor Lindsay, who had condemned the actions of the rioters.