I don't think she actually had a bomb. Aside from spare mags (I counted over 30 rounds fired), it looked like little propane bottles or fake explosive bundles. She had a yellow wire running from her hand to something.What was she doing in the backpack? Getting a tuna fish sammich out?
If her goal was to detonate something, as she said, why even bother with AR- just go into bathroom or such and go visit Allah?