Here’s the bad news. One day you or someone like you will be shopping in a mall or enjoying a concert or about to catch a train when the first sudden, sharp crack will rend the air and your world will change forever.

Around you, people will start to crumple and as the panic and horror finally dawn the screams will begin while the automatic rifle fire escalates and those still standing will begin to flee — but where to? If you run away from the gunfire you’re being herded into a trap.