http://www.argusleader.com/article/20100901/NEWS/9010327/1001/news18 year old arrested for having weapons and explosives makings so he could "cause as much chaos, death and destruction as possible and become the world's most infamous sociopath for the rest of mankind," according to court documents. He worked at a day car and told a co-worker that he had enough fireworks to blow up the town and that the first day of school would be a short one. He was caught looking up Columbine articles on the school computers.
Please note that in no way do I endorse what he was going to do. I do have to make the observation that it appears that he had a very solid plan in place except for the fact that he couldn't keep his mouth shut and concerned citizen rightfully turned him in.