Since they have this huge data base of child porn, they should set up a web site and post pictures of every child they have (face shot only) Advertise the link to it, let the public see it and many might be recognized and rescued.
The down side being that it might further endanger the child
Maybe not a good idea after all.
Sort of off topic, but there is a great rock and roll band named Interpol that I thought of when I read this thread title. They have a really good song called "NYC" that makes me think about the twin towers and 9-11.