On May 13th 1960, a group of Bay Area college students gathered outside the Supervisors' chambers at City Hall on the second day of hearings by the House Un-American Activities subcommittee, which was touring the country to root out Communists in unions and the teaching profession. The SFPD ended up turning fire hoses on the kids to disperse them, and arresting 64 of them in a "riot" that got national attention and eventually led to the Free Speech Movement. As the Chron reports, HUAC's subsequent propaganda film about the protest completely backfired. ""People saw that film, and said, 'I'm going to Berkeley!'" says former teachers union prez Marty Hittelman, who was in the hearing room that day. [Chron]