After the passage of the 1964 Civil Rights Act, conditions did not drastically improve for most African Americans and impatience with the slow pace of change led some to more radical methods. The Freedom Summer campaign in 1964 aimed to register black voters in Mississippi but faced violence. The 1965 Selma march pressured Congress to pass voting rights laws, resulting in the Voting Rights Act. However, discrimination and poverty still plagued urban communities, sparking riots in cities in 1967. New leaders like the Black Panthers advocated for black power, while King continued nonviolent advocacy until his 1968 assassination.