what made humam khalil al-balawi, what made him a triple agent? >> guest: a historical case. very unusual in the sense of agents come in various stripes, sometimes low level people who decide for whatever reason to sell secrets or sell their knowledge to an intelligence agency sometimes they're well-trained double agents who spend years behind the enemy lines, cultivating information. these are very special highly trained agents. our triple agent is none of these. he's someone who came from a very al qaeda sympathy, or sympathetic background. mitchard through some really unusual circumstances to become an informer for the ca while really being in al qaeda's camp in terms of his sympathies. so he played this double game with us and it was essentially made him a triple agent. >> host: let's take a step back. if he's a triple agent, what did each person who dealt with -- he was a pediatrician. what did each person think they were getting from him before the bombing he carried out in afghanistan? >> guest: he came as a blogger for a jihadists website. he was a very radicalized yo