In the last eight years of world chaos, many a U. S. citizen has given fervent thanks that the U. S. is endowed with ample supplies of all but a handful of basic resources.
But the U. S. has not been spared from getting down to cases about tanks, torpedo tubes, guns, engines, propeller shafts, observation instruments, etc. Manufacturing these requires one of the few basic materials the U. S. happens to lacktin. So does manufacturing tin cans to hold the No. 1 necessity of war and peacefood.
Over 80% of the U. S.'s...
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