What Caused the Crisis on Wall Street?

From Poweline.

This video does a good job of explaining, in simple and accessible fashion, the origins of the current crisis:

I will let readers Google for themselves, as the video suggests, to make their own determination as to the root cause of the current financial crisis.

HT to John at Powerline.

Update: You Tube (America) has pulled the video. It can now be found here. It can also be found at Live Leak.