ultimately he chooses this place, a little park called geary lake. it's fairly remote although not all that remote. >> geary lake is a fishing lake, but it's a little too cold at this time of year, it's a windy, choppy day on the lake, and there's nobody there. and so, you know, they're inside the truck. >> you can cut the tension in the air with a knife, it's that thick, because they want to move quick, because they're a sitting duck there. >> all the mixing takes place within the truck. since i was the principal, as i put it, right? i was the one that primed the charges, the crimped the caps, the fuse, etc., etc., tied each barrel, made sure there were redundant fusing systems so if one misfired another one would fire it. all kinds of redundancies, made sure that the barrels were stable and in place. >> i don't think there's much doubt that mcveigh did build a hell of a bomb. the way he did it was fairly remarkable. no one had really ever constructed a bomb like this, and yet it was incredibly effective. it seems very clear he thought through these