Host Michel Martin marks the passing of two historic lives. Former Black Panther Geronimo Pratt died on Thursday in Tanzania. He served 27 years in prison for a murder he insisted he did not commit, before his conviction was overturned in 1997. Martin also marks the death of Albertina Sisulu, a veteran of the anti-apartheid movement in South Africa. Sisulu spent months in jail for her work championing the rights of women and children. She was 92 years old.