mr. koresh. >> on the evening of the 18th of april, steve schneider gets on the phone with the negotiation team, and we're continuing to press him. steve, we need something. you've told us, he's done with the first seal. send it out. >> we got nothing, absolutely nothing. >> when we briefed up the boss, and told him that we had not gotten anything tangible to prove that david was even working on this, that was it. that was the straw that broke the camel's back. by this time, the department of justice has authorized the use of tear gas and the decision was made to go forward the next day. >> in an effort to drive the davidians out, the fbi readies tanks to insert tear gas into the compound. >> i think the fbi knew that you could never take david's word for final. he had proved that. and so it was quite reasonable for them to doubt that david would come after he wrote the explanations of the seals. on the other hand, that doesn't mean you had to ram his house with tanks. >> the morning of april 19th, the phone was ringing and ringing, and no one was getting the phone. and i remember going down th