and the most hard core can be found 50 miles east of brussels in the town of hasselt. the prison was built in 2005. it houses 470 men and, in a separate unit, 30 women. >> this is unique. the other prisons in this country, they are old prisons. they are more than 100 years, 150 years old and have a culture. bad or good culture but they always have a culture. we started from zero. >> as the nation's newest high security prison, hasselt employs a wide array of technology to manage inmates. but many of the prison policies are nothing at all like we've ever seen in the u.s. from 9:00 at night until 6:30 in the morning, correctional officers are not allowed to go inside cells without special permission from the prison director. >> at knive clock the prisoners are locked in their cells. the chief comes to collect the keys. and you cannot go in the cells. >> you cannot? >> yes. >> why? >> that's the rules here. >> what do you think goes on behind these doors? >> i don't know and i don't want to know. but when you go around, make your checks, you can sometimes smell the weed.

hasselt, inmate burack ersen has just spent his second night in an isolation cell.or getting into a fight with another inmate. >> i'm the black sheep always. if there's ever anything, it's always me. >> this morning he will meet the prison's disciplinary committee to find out if there will be any further punishment. the inmate he fought, erik franzen, will also go before the disciplinary committee. but he seems no more concerned now than he was when he casually walked away from the fight as officers swarmed burack. >> what do you think is going to happen? >> i don't know. >> are you worried? >> no, no. >> no? >> prison officials claim that erik franzen is a well behaved inmate and it's only his violent reputation outside of prison that requires them to house him in section 20. >> with the police he has a very heavy reputation that he's a very heavy guy in the criminal environments. it is a reputation that follows him and he has a lot of crimes and it's often with guns. >> i'm 39 years old. i was before ten years in jail for armed robberies and then i go free and i c