Human rights groups say Israel is indiscriminately using white phosphorus in Gaza's densely populated areas. When ignited, the chemical can burn the flesh off of a person, down to the bone.
Siddharth Kara first encountered the horrors of sexual slavery in a Bosnian refugee camp in 1995. Since then, he has traveled to several countries to learn the mechanics of this brutal business and to take stock of its devastating human toll.