http://www.realclearmarkets.com/articles/2011/04/26/lets_put_to_bed_the_america_is_bankrupt_myth_98983.html
http://pragcap.com/why-the-usa-isnt-going-bankrupt
http://www.washingtonpost.com/blogs/post-politics/wp/2012/10/23/fact-check-the-u-s-is-in-debt-but-not-bankrupt/