apparently have telephone contact with somebody in the compound. my name is dave koresh. david koresh. to his followers, david koresh was a messiah. god speaks to me. manifestation of god in the flesh. we believed this man had the truth. reporter: but to the u.s. government, david koresh was a threat. machine guns and explosive devices. reporter: in 1993, they went to war in waco. this ain t america anymore when the atf has that kind of power. reporter: it ended in catastrophe. 86 people dead. including at least 24 children. there had been nothing like this before. this siege was new and unique in american law enforcement history. if you distrust the government, waco is going to be symbolic to a lot of people of what they really fear. i m talking to you. somebody s going to get hurt. if he asks god for some kind of sign and god gives it, what does that mean? reporter: every saturday morning clive doyle and sheila martin study the bible. behold