the bombers were led by a twenty two year old college dropout carl armstrong. this is the route you came up from the y.m.c.a. armstrong agreed for the first time to return to the building and talk about the night he's bombed wisconsin. where did the idea come from a car bomb my brother who wanted to be like basically you know we were considering ways to our math research center them never going so soon oh why don't we just fill up a truck full of explosives into sudden off the side of the building and my immediate reaction was that's crazy the armstrong brothers stumbled upon the ultimate terrorist weapon of the twentieth century. but there was another deadly twist they bought the base materials for their explosives in the local hardware store. first while we bought the materials from a farmer's co-op morning nitrate and fuel oil and then we transported it to our site which was a farmer's field and not basically we just put you know the ammonium nitrate and you know except by hand own only just poured it into the barrel. and you get the idea you didn't have the

carl peterson came up one touched short. he shoots a 60 to move into second place. alberto all but clinched his third tour de france. that should be emotional ride for lance armstrongs like 23 minutes behind. bill should be emotional for him. >> that is that for us. we'll be back at 11:00. also the news is always on c bs5. , ,,,,,,,,,,,,,,