Martin Luther King Jr. returned to Montgomery in 1965. Local civil rights leaders in Selma had been protesting Jim Crow laws and practices that raised barriers to blacks registering to vote. Following the shooting of a man after a civil rights rally, the leaders decided to march to Montgomery to petition Governor George Wallace to allow free voter registration. The violence they encountered from county and state highway police outraged the country. The federal government ordered National Guard and troops to protect the marchers. Thousands more joined the marchers on the way to Montgomery, and an estimated 25,000 marchers entered the capital to press for voting rights. These actions contributed to Congressional passage of the Voting Rights Act of 1965, to authorize federal supervision and enforcement of the rights of African Americans and other minorities to vote.