from a quarry in marion, kansas. then that december, mcveigh and miael fortier go to oklahoma city to case the murrah building. >> we know for certain that mcveigh examined multiple federal buildings. he, in particularly, scouted out the murrah building on multiple occasions. we know that because he took michael fortier directly to the murrah building and said after his examination of all the potential targets, this is the one he was going to hit. >> mcveigh picks april 19th the date. known as patriots day, it's revered by many in the right wing anti-government movement. >> on april 19th, you have the first shot fired at lexington in the american revolution. on that day, waco occurs in 1993. and then two years later, mcveigh blows up his truck bomb