You've surely seen the famous photo of white students screaming at Elizabeth Eckford as she tried to enroll at Little Rock Central High.
This Wikipedia entry tells the story of Hazel Bryan (now Massery), the meanest looking girl, the one right over Eckford's shoulder with her mouth open wide, screaming. Apparently she and Eckford made up in later life. She even appeared with her and other Little Rock Nine members on Oprah, and apologized.
She may have been hiding a nice personality inside all those years, as Wikipedia claims, but when I see that picture, I still want to go back and smack her one. (Via Metafilter.)