>> to hell with america! >> the leading light of the group, according to counterterrorism officials, was this man, yousef al kahtab. >> i love osama bin laden. i love him -- whoa, like i can't begin to tell you. >> he recently told cnn's drew griffin that he met bryant. >> how closely did you know bryant neal vinas? >> i met him one time. >> one time? >> that's it. i just knew that he was a good muslim brother and that was it. >> and you are an enemy of islam! >> you are an enemy of islam. >> but law enforcement officials tell us that kahtab met bryant on several occasions. khattab has since left the united states. so we tried to locate ahmed zarrini, the islamic thinkers society member, who we've been told first introduced bryant to the radical group. khattab has told us that ahmed zarrini was considered an extremist even within the islamic thinkers society.