officer darlene fieste is still adapting to working behind the walls of folsom. >> i'm not used to being around violence when i started, you know, not that. it really shocked me. how cruel and emotionless these people can be. >> it does get scary sometimes. you hear a lot of the war stories from around here. >> i've been stabbed. i've had my knee broke. >> i had a back injury first, stabbed. >> i was assaulted by an inmate in handcuffs. >> i was stabbed seven times. >> if you show the inmates fear, then they're going to go ahead and feed on it. >> keeping that fear in control can be difficult inside this 100-year-old prison because what was state of the art at the turn of a previous century is now the biggest challenge to the officers' safety. >>> when we return, cellblock 5, the most notorious cellblock inside folsom. every day we're working to be an even better company - and to keep our commitments. and we've made a big commitment to america. bp supports nearly 250,000 jobs here. through all of our energy operations, we invest more in the u.s. than any other place in the world. in fact