Master Ahnk:
Kas, it is not impossible to cancel NRA meetings. It's just unprofitable.
Ten day notice required for, Columbine happened eleven days before.
Yes, it wouldn't be
impossible (even though you would have thousands of people driving through Columbine wondering where the heck everything is), and I do agree it could be seen as a bit insensitive to hold the meeting, but they did cancel everything but the required meetings. It's not like they came and partied, shooting guns everywhere, and detonating explosives.