Debt Ceiling $14.3 Trillion (Are we there yet?) http://en.wikipedia.org/wiki/United_States_public_debt
Plus
Unfunded Liabilities $59 Trillion http://www.usatoday.com/news/washington/2007-05-28-federal-budget_N.htm
Our government borrowed all this money.

I was watching Chris Martenson's presentation at Marlboro Graduate School and at about the 11 minute mark he goes into US Debt to GDP. From the graph it looks like we have about 3x as much debt as GDP. However, I cannot verify these numbers and have actually found contradictory numbers. National debt is approaching 13 trillion from what I could find, but GDP seems to be about the same (source was BEA). I don't doubt Chris's numbers, but I'm trying to figure how to back into that graph. Any suggestions?