just across the bay from the glitter of san francisco lies the rough-and-tumble port city of oakland. with ships and cargo constantly coming and going, blue-collar oaktown has become a hot spot for a different sort of trade. human trafficking. >> arrest teams. two girls westbound. >> oakland, california has unfortunately been identified by the fbi as a hub for human trafficking and specifically the sexual exploitation of children. >> sergeant holly joshi is part of the oakland police department's human trafficking task force. >> the fact that we've been identified by the fbi as a hub is very disturbing to all of us in this city. and even though we do have budget challenges, we have made it a priority to, you know, get out there and run these operations on a weekly basis. >> we just kind of combine resources to get by. >> sergeant jim saleda is a veteran cop with some 20 years working the streets of oakland. >> every major city has a place where the girls can be found. >> in oakland many of the girls