"Why don't school shootings happen every day, then? Probably because "insane killers" aren't bestowed with the logical thought processes attributed to them by the NRA chief. That's why they are, by definition, insane."
Rachel, if your goal is record number of responses or increased credibility with the gun grabbing left, congratulations. The three mass murdering insane killers that come to mind whose names I refuse to remember are Fort Hood, Aurora and Sandy Hook and were all very intelligent. They knew armed resistance was unlikely. Even the Fort Hood terrorist on a suicide mission chose a "gun free zone" on base.
The real and obvious reason shootings like this do not happen every day is that there just are not very many insane killers.