>> david koresh. >> my name is david koresh. >> to his followers david koresh was a messiah. >> god speaks to me. >> manifestation of god in the flesh. >> we believe 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. the siege was new and unique in america law enforcement history.