If you had heard a presentation about the Columbine shooters, you would see that they had a well thought out plan. I'll pass on sharing it here. We went over it at Tom Given's Tactical Conference.
Cho and Aurora were not without planning. Let's not posture that we are tactical giants compared to them.
I would like opinions focused on the question. Would a Cho, Holmes, Columbine duo - having seen the training videos - be ready to take some advantage due to the plans?