Rosa Parks was a civil rights pioneer who refused to give up her seat to a white passenger on a bus in Montgomery, Alabama in 1955. This sparked a 381-day bus boycott led by Dr. Martin Luther King Jr. that challenged segregation in public transportation. Eventually the US Supreme Court ruled that segregation laws in Alabama were unconstitutional. However, Rosa continued to face threats and had to move to Detroit in 1957 due to the danger. She is remembered as an iconic figure in the civil rights movement who helped launch nationwide efforts to end segregation.