That's the subject of this article which features analysis by one of the few commentators to predict the existing situation as early as 2006.
Ultimately, the article concludes:
The risks are indeed high and the ability of the authorities to deal with them more limited than most people hope. This is not to suggest that there are no ways out. Unfortunately, they are poisonous ones. In the last resort, governments resolve financial crises. This is an iron law. Rescues can occur via overt government assumption of bad debt, inflation, or both. Japan chose the first, much to the distaste of its ministry of finance. But Japan is a creditor country whose savers have complete confidence in the solvency of their government. The US, however, is a debtor. It must keep the trust of foreigners. Should it fail to do so, the inflationary solution becomes probable. This is quite enough to explain why gold costs $920 an ounce.Not surprisingly, the sprawling housing market makes a notable appearance in the Top 12. Nothing like a true market solution to an unsustainable problem.
The connection between the bursting of the housing bubble and the fragility of the financial system has created huge dangers, for the US and the rest of the world. The US public sector is now coming to the rescue, led by the Fed. In the end, they will succeed. But the journey is likely to be wretchedly uncomfortable.