unfortunately. >> today the task force has invited us to ride along for a firsthand look at their efforts to combat the illicit sex trade in the motor city. >> our objective overall obviously is recover as many juveniles as possible. second unto that is build cases. >> investigators begin the operation by browsing the online ads for adult services in metro detroit. they are hunting specifically for postings like this one for lil barbie, a very young-looking woman who appears likely to be underage. >> who's doing lil barbie? you? >> initial calls to set up a date with lil barbie go unanswered, but detectives will keep her very much in mind. meanwhile, undercover officers begin to set up dates with other women who also appear to be quite young. >> okay. you'll come to my hotel, right? >> investigators have booked adjoining rooms in an upscale hotel. in a matter of minutes, they will transform the scene into a high-tech snare for call girls. >> the surveillance room where we'll be set up is 204, the