(CNN) – Greg Mortenson, the high-profile advocate of girls' education in Afghanistan and Pakistan, has been forced to defend his best-selling book "Three Cups of Tea: One Man's Mission to Fight Terrorism and Build Nations … One School at a Time," against charges that key stories in it are false. Mortenson shot to international fame … Continue reading Bergen on Mortenson's 'Three Cups of Tea': 'This is totally false and he is lying. He was not kidnapped.'