Of the various terrorism scenarios I'm just worried about two. LAX is a prime target for both a nuke and a biological attack. Al Qaeda's tried to hit LAX before, and 9/11 showed they like to keep trying until they succeed.
The nuke is simpler to deal with--hole up in the house, seal a room, have a filter for ventilation, and wait for the fallout to stop landing.
Smallpox or another plague is tougher--it'll keep spreading, and a vaccination would probably kill Maggie. So keep Laura and the kids in the house, and I sleep in the garage. That keeps them safe, and lets me get vaccinated or forage for supplies, depending on how bad it gets.
Neither of these are very likely scenarios, but we didn't expect 9/11 either. So hopefully all the stuff will sit there until we take it camping or something. The best defense against this stuff is a good offense. Here's praying for the offensive.