just one month after that meeting in kandahar, september 11, 2001. as the united states reels from the attacks, those who know about that meeting in kandahar, reel over what might happen next. the big question becomes, how far along is al-qaeda in its pursuit of a nuclear bomb, and how can the united states stop them from sending one? >> that's a piece of cake if you have enough material. if you look at the hiroshima bomb, it was much bigger. if you think of a two-ton bomb, think of a thousand tons versus two tons. it's inconceivable. even if you look at the hiroshima pictures, it's inconceivable what a bomb that size can do. >> ralph larson had been planning on a new cia posting in