Rosa Parks, a seamstress and NAACP member, was tired of being treated like dirt on Montgomery's buses. On that fateful day, she refused to give up her seat to a white passenger, sparking a wave of resistance. E.D. Nixon, a local civil rights leader, bailed her out of jail and, together with Dr. Martin Luther King Jr., orchestrated a city-wide boycott of Montgomery's buses, ending segregation on public transportation.