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View the entire show at http://www.pbs.org/wnet/expose/watch/index.html

In the summer of 2004, Cam Simpson, an investigative reporter for the Chicago Tribune, heard a report on the evening news about 12 Nepalese men kidnapped and brutally executed by an extremist Islamic group in Iraq -- murdered, the group claimed on a Web site, for cooperating with the U.S. To his colleagues on the ground in Baghdad, the story was hardly distinguishable from the constant carnage surrounding them each day. But Simpson, familiar with the military's increasing privatization of support operations -- as well as the Middle East's human trafficking problems -- sensed a bigger story.

And watch the full episode online beginning Wednesday, September 19, at 12 noon ET. (Or check your local listings for broadcast dates on PBS nationwide, beginning Friday, September 21.)

For web-exclusive video and audio features, and to stream other episodes in the series, go to http://www.pbs.org/expose