There are three general levels of prisons in the U.S.: minimum, medium and maximum security. A minimum-security prison might look more like a college campus. The prisoners there are usually nonviolent offenders with relatively clean criminal records. Sometimes, a prisoner who committed a violent crime may transfer to a minimum-security prison from another prison if he's nearing the end of his sentence and has shown exemplary behavior. Medium-security prisons hold more dangerous criminals and have more restrictions on inmates. They're usually surrounded by barbed wire and maintain a greater degree of control over the daily lives of the prisoners. Maximum-security prisons hold the most violent criminals, those who have tried to escape from a lower-security prison or those who might cause some kind of problems in a lower-security facility. Maximum-security prisons not only have the razor wire fences but they also have towers with armed guards who are empowered to shoot anyone who makes it over the wall.
What's it like to be a judge on a reality show?
Answered by Tom Colicchio
What was the largest antiwar protest?
Answered by Discovery Channel
Why won't playing like the house help you win at blackjack?
Answered by Science Channel