The technical rationale behind "duck and cover," in one simple graph: (Defense Civil Preparedness Agency, 1973)pic.twitter.com/n4q7sa7RZK
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I've found in my preliminary playing around with these kinds of things that the scenario/city really matters. Because all of these things are about reducing casualties on the "fringes." For some city/bomb pairings, it does less than you'd think. For others it does more.