It's one of the most famous prisons in American history, featured in countless movies and novels. Its inmates have included such diverse characters as Charles Manson, Sirhan Sirhan, Eldridge Cleaver, Merle Haggard, and Neal Cassady. It's the one of the oldest continually operating institutions of California state government. San Quentin State Prison is as iconic a symbol of California as the Golden Gate Bridge or the Hollywood sign, yet few people...