Not my article, but definitely along the lines of what I was referencing in my "Get in the Fight" article.
Prepare yourself for mass chaos and carnage. Look at pictures from terrorist attacks and watch video of the bombing of the Boston Marathon. Watch the HBO specials on the first two incidents I mentioned above. That will be the reality confronting you at that time. This brutality cannot shock you into inaction. Be prepared to step over bleeding children, screaming for help, and having to leave them in that condition, possibly to die, as you press ahead to stop the attack, or fight your way out.
Read the rest of the article at FPFTraining --> Here <--