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Comment Re:Stop getting bullet theory from movies. (Score 2) 175

Two telephone books (do they even print those anymore?) will (just) stop a 9mm. That's FMJ -- and a reasonably large metropolitan area telephone book. Even a .22 LR will penetrate a couple of inches.

Military rifle ammo won't stop for much short of a couple of railroad ties. (The old standard for 7.62mm NATO and similar was that it had to penetrate a steel helmet at 1000 yards. Modern 5.56mm (.223) stuff is a little wimpier -- but will still easily go through a car door at close range.)

Comment Re:Mass Impersonation (Score 2) 122

You might want to read up on how aircraft navigated before GPS (and still do, to some extent). In addition to ATC beacons, RDF (radio direction finding) off of commercial AM broadcasting stations was and is a thing. Triangulating from two isn't that hard for a human, it's a trivial task for a computer. Good luck overriding the signals from a few multi-kilowatt commercial broadcast towers.

Comment Re:Not just boring. (Score 1) 184

I was wondering whether somebody would comment on the Mars connection. Musk doesn't seem to do anything without there being a Mars connection.

Well observed. (Although radiation isn't that extreme, it is a concern ... as are meteorites that the thin atmosphere also doesn't shield too well from. This may be as much about mining (digging for ice deposits?) as about tunnels to live in.)

Comment Re:Automation of the military (Score 2) 210

Oh, not looking the enemy in the eyes started long, long before Dresden, or even The Blitz. Hell, it was old when the English at Crecy and Agincourt rained death on the French with longbow and cannon. It was probably old when Xerxes attempted to do the same (well, sans cannon) to the Greeks at Thermopylae.

War isn't a contact sport, it's a continuation of politics by other means.

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