disturbance going on. and they were locking down the floor. >> that was a backup call you just heard. officers are responding to the fifth floor emergency. >> put them on their bunks. everybody on their bunks. >> fortunately it turned out it wasn't a riot and we were able to keep shooting. that's what makes jails very interesting. there's a strong sense that anything can happen at any time. >> and nowhere is that more true than behind the walls of the sprawling jail complex that serves america's largest city. >> while new york city is the safest largest city in america, crime has been going down, one of the reasons the crime is going down is because the police do make a lot of arrests. everybody who gets arrested and who doesn't get bailed out comes