On March 7, 1965, around 600 protesters left Selma. Clark's officers and posse joined with Alabama state troopers in attacking the protesters on the Edmund Pettus Bridge on the outskirts of Selma in an event that came to be known as "Bloody Sunday", resulting in the hospitalization of over 60 protesters. That evening, ABC interrupted the television premiere of "Judgment at Nuremberg" to show scenes of the violence to around 48 million Americans. This was a critical event in the United States Congress passing the Voting Rights Act.