Do you know what to do in an Active Shooter incident?
FEMA has developed an Active Shooter Training that is free. It is directed at workplace violence, but the lessons can be applied to any Active Shooter incident, be it the mall, church, or school.
I suggest you clear 45 minutes of a day this week and take the training. It's painless and will hopefully provide you with a plan should the need arise. It's always better to have a plan than to be caught completely unawares.