I'm sure you can find it on the web, but in a nutshell, he describes his advice to his wife, in case of trouble, to fire a couple blasts, the problem will be solved!
That's right. For her anyway. She'll now be disarmed, as her shotgun will be empty, she'll have fired at no real point of aim and no defined backstop. The problem for her neighbor that gets hit by falling buckshot is probably not over. The problem for that home invader that now gets to steal an unloaded double barreled shotgun could be over... The problems for the Secret Service agent that just shot the Second Lady Of The United States because he thought she was trying to shoot Uncle Joe in a domestic violence spat may be just starting...