And finally tonight: A new PBS documentary shines a light on the oppression of women and girls worldwide." Half the Sky" airs in two parts over two nights, starting this evening. It's based on a book of the same name by New York Times columnist Nicholas Kristof and his wife,journalist Sheryl WuDunn. Kristof traveled to six countries to look at gender based violence, forced prostitution, maternal mortality, and other issues. In this excerpt, he and actress Eva Mendes tour a sexual abuse victims center in Sierra Leone. Welcome to the Rainbo Centre. Really, we 're primarily responding to rape. We provide specialized medical treatment and counseling as well. Counseling? Yes. We have seen over 9,000 survivors within eight years. Eight years. Fifty two percent that are between the ages of 12 and 17.Then you have about 26 percent that are under 12. Under 12? Twenty six percent are under 12? That are under 12 years old, yes. OK.Wow. They are. The trend is, we are seeing more and more children, about 80 percent of our clientele. We see an average between 100 to 200 a month.And they are as young as two and-a half months old. Excuse me.Sorry. We have a three year-old that has just come in for follow up.