When I was a kid, we were told to be ready for an attack by Russia. We were taught that in the event that the air-raid sirens went off, we were to duck and cover, and we were also told that we should be under our desks until the all-clear was sounded. What's wrong with that scenario? Our little elementary school was downstream from a very large hydro-dam holding back 15 miles of impoundment. If there was a single high-value target in Central Maine, that was it. One well-placed bomb could have taken out the state's largest power generating station, and the resulting flood would have destroyed towns and cities in the valley all the way to the sea, including two county seats, and the state capitol. That's a lot of destruction at the cost of one bomb. We could see the dam looming over our school-yard as we played at recess, etc. What good could "duck and cover" have done? If the Russkies nuked the dam, we all would have been vaporized instantly, and our ashes would have joined the huge wall of water and debris bearing down on the towns and cities lining the valley. The school is the building with the wrap-around paved drive.