its inmate population includes manson, robert kennedy's assassin, sirhan sirhan, and some of the nation's most violent prison gangs. lockup crews have also been frequent guests at california's state prison corcoran. >> you might have to fight. you might have to stab. you never know. depends on the situation. >> a lot of times it is fist fights out here. but i would say maybe every other month we get a righteous stabbing. when they do stab each other they go for the kill. they don't just stab each other to play around. >> every morning you wake up you are dealing with 1,000 different attitudes. you never know what can happen on that certain day. all you can do is think the worst, hope for the best. >> we met two inmates on the yard at corcoran who are much more pro-active when it comes to surviving life in this powder keg. they gave our crew a tutorial on how they do it. >> the rules you want to live by behind the walls you want to give everybody the same respect that you expect to receive from them. >> without order we have anarchy. when we have anarchy we have people die here. >> robert