Bettmann / Corbis On Sunday, May 14, 1961—Mother's Day—scores of angry white people blocked a Greyhound bus carrying black and white passengers through rural Alabama. The attackers pelted the ...

Segregation happened on buses too. One day, Rosa was in a seat for black people, but white people's seats were full. The bus driver wanted Rosa to give her seat to a white person, but Rosa said no!