Al Jazeera also did a series on modern slavery (http://www.aljazeera.com/programmes/slaverya21stcenturyevil/). The Bonded Slaves episode covers Pakistan and the use of slaves in brick kiln factories. If you're outside the U.S. you can watch it online (from their site or on their YouTube channel). If anyone inside the U.S. wants to watch it, then I'm afraid you're out of luck since we lost online access when Al Jazeera America launched.