On April 4, civil rights activist Dr. Martin Luther King Jr. was assassinated. The United States erupted in violent riots, the most severe of which occurred in Washington, D.C., Chicago, and Baltimore. Extensive areas of these and many other cities were looted, burned, and destroyed by the rioters and more than 40 people were killed during the month of protest, which led to greater racial tensions between Americans. Despite this, a landmark piece of legislation, the Civil Rights Act of 1968, which was President John F. Kennedy's legacy, was passed by the expertise of President Johnson in April. This legislation was passed with bipartisan Congressional support and effectively prohibited housing discrimination based on race.