Surprise: US national debt is > $13 trillion. And no, most of it isn't packed briefcases of five-dollar notes. And discount rate of 0.5% is not as normal, as

Surprise: US national debt is > $13 trillion. And no, most of it isn't packed briefcases of five-dollar notes. And discount rate of 0.5% is not as normal, as one might think. Compare with China -- ~3%, or Russia -- 7.75%.