My opinion column appeared yesterday at the Guardian:
After Sandy Hook, students across America have seen schools introduce active shooter simulations involving gunfire, masked men running down school halls and “victims”. These drills are realistic, and in some cases, downright terrifying. Arguments that support them hinge on the belief that the verisimilitude predicts actual behavior and increases the chance of survivability in a real event. That may well be true, but it ignores the fact that active shooter drills themselves can leave scars.
Read the full op-ed here.