Last month, the FBI announced the arrests of dozens of people in a child pornography sting operation called "Operation Candyman." The sweep targeted an on-line child porn club with 7,000 members worldwide. Child advocates praised the effort. But some say it only scratches the surface of a growing problem. As Mainstreet Radio's Tom Robertson reports, there are efforts in Minnesota -- both public and private -- to hunt down online sexual predators and consumers of child pornography.