high-security cells. because of the violence, a stab-proof vest is part of every nurse's uniform. medical staff deal with the survivors of gang hits, treating up to 50 stabbings a year. >> got his head blown off, that's probably the worst one. but we've had lots of major stabbings, lots of gunshots, lots of people who have been stabbed in through the chest cavity, who we stabilize here and ship immediately to trauma centers for emergency surgery. you don't ask questions. you basically deal with them as patients. if you start digging into their backgrounds and finding out what they've done, it could change your whole perspective. we have a special clientele here that you don't want to know too much about them. >> i got to eat. >> a high-security prison hospital presents particular problems for employee safety. every day, staff try to achieve the best balance between medical needs and custody concerns. >> there is a doctor here. they are dealing with another