Rosa McCauley Parks (1913–2005) was an African American civil rights activist whom the U.S. Congress dubbed the "Mother of the Modern-Day Civil Rights Movement". She is famous for her refusal to relinquish her seat to a white man. She was arrested & tried on charges of disorderly conduct & violating a local ordinance. Found guilty, she appealed & formally challenged the legality of racial segregation. After the boycott, she became an icon & spokesperson of the civil rights movement.
Rosa Parks quote: People always say that I didn't give up my seat because I was tired, but that isn't true. The only tired I was, was tired of giving in. Link to her biography on Black History: http://www.history.com/topics/black-history/rosa-parks
10 revolutionary acts of courage by ordinary people
Rosa Parks was asked to move to the back of the bus where black people were expected to sit, by the whites. When she refused, police became involved, essentially leading to her arrest. Rosa Parks is a true Civil Rights leader, due to her strength and bravery. This arrest eventually led to the Montgomery Bus Boycotts, where African Americans did not use the buses, but walked instead.