John Lewis, the civil rights hero and Democratic congressman, has died at the age of 80. In 1965 he headed a march across the Edmund Pettus bridge in Selma, Alabama, and was knocked to the ground and beaten by police. The incident, along with other beatings during peaceful protests, brought attention to racial oppression in the US south. Twenty years later he recalled the events for the documentary series Eyes on the Prize for Washington University in St. Louis