nathan-dumlao-EPpmQg24Ipk-C-unsplash.jpg When I was in first grade, there was an air horn signal that the principal in my elementary school would periodically sound in the hallways for practice. When the classes heard the horn, we were to stop what we were doing, climb under our desks, and fold our arms on top of our head. This was the signal that we were under a nuclear attack from the Soviet Union. I doubt any of this would have been effective in the event of a real nuclear