In the second half of the 20th century, racial tensions rose in the US as African Americans began to challenge unjust laws that supported discrimination and segregation. This movement found its leader in the patient and inspiring minister, Dr. Martin Luther King, Jr. Students will watch a short video and engage in two primary source activities in order to explore how King's deep-seated commitment to nonviolence contributed to the expansion of social justice in the United States, particularly for African Americans. [5:09]