Birthday of George Jackson

From Wikipedia: "George Lester Jackson (September 23, 1941 – August 21, 1971) was an American author, prisoner, and revolutionary. While serving an indeterminate sentence for stealing $71 at gunpoint from a gas station in 1960, Jackson became involved in the Black power movement [...] In August 1971, Jackson was killed by prison guards during an escape attempt at San Quentin State Prison."