US debt to bondholders is around $14.5 trillion.
The US also promised Medicare and Social Security payments to retirees that are underfunded by $59 trillion:
http://www.usatoday.com/news/washington/2007-05-28-federal-b...
The numbers will vary here according to longevity and interest rates, but the bill is huge, and it will have to be paid with tax money.
US debt to bondholders is around $14.5 trillion.
The US also promised Medicare and Social Security payments to retirees that are underfunded by $59 trillion:
http://www.usatoday.com/news/washington/2007-05-28-federal-b...
The numbers will vary here according to longevity and interest rates, but the bill is huge, and it will have to be paid with tax money.