RIP: Rosa Parks

(CNN) -- Rosa Parks, who helped trigger the civil rights movement in the 1950s, died Monday, her longtime friends told CNN. She was 92.

Parks inspired the civil rights movement when she refused to give up her seat on a bus to a white man in Montgomery, Alabama in December 1955.

Her arrest triggered a 381-day boycott of the bus system by blacks and led to court rulings desegregating public transportation nationwide.