Abdul Salam Zaeef, barely thirty years old, was the Afghan ambassador to Pakistan just before and after the September 11th attacks. The Taliban regime he served was so isolated that Zaeef became its youthful, thickly bearded international face while American bombs were falling on Taliban lines and Northern Alliance troops swept down toward Kabul. A few weeks after the fall of Kandahar, Zaeef disappeared in Pakistan. It turned out that Pakistani intelligence had handed him over to American...