http://www.npr.org/blogs/money/2011/04/15/135423586/when-the-u-s-paid-off-the-entire-national-debt-and-why-it-didnt-last http://www.npr.org/blogs/money/2011/04/

http://www.npr.org/blogs/money/2011/04/15/135423586/when-the-u-s-paid-off-the-entire-national-debt-and-why-it-didnt-last http://www.npr.org/blogs/money/2011/04/15/135423586/when-the...