So I sat my 8yo down and had a talk with him. I told him what happened in Connecticut, and warned him that there may be some changes at school (more drills, stricter hall pass policy, resource officer etc) I told him not to be worried, and that it was very rare, but unfortunately it does happen. We talked about his lockdown procedures and he described them to me - they have that squared away pretty good. They we talked about safe people - he knows he can always trust his mom and me, and that if the school goes into lockdown then he should always do whatever the teacher says immediately without question. He is to follow the orders of a police officer or firefighter without a moment's hesitation. There. It's done. It breaks my heart to have to talk to him about this, but such is life.