On March 7, 1965, 600 people began a march toward Montgomery, Ala., from Brown Chapel AME in Selma. The group, let by civil rights activists like now-Congressman John Lewis and Rev. Hosea Williams, were stopped by state troopers on horseback. When the marchers refused to back away — standing their ground on the Edmund Pettus Bridge — the troopers attacked, beating, trampling, and tear gassing the participants.
Today, that bridge made famous on Bloody Sunday, was declared at National Historic Landmark, along with 12 other sites, by U.S. Secretary of the Interior Ken Salazar.