Alan Greenspan is testifying now before the Financial Crisis Inquiry Commission (FCIC). Watch now.

Tomorrow, Chuck Prince and Robert Rubin from Citi testify and Robert J. Levin and Daniel H. Mudd formerly of Fannie Mae will testify on Friday.

It's clear from this and past hearings that the big banks need to be held accountable. The greedy and reckless behavior of big banks on Wall Street caused a financial crisis that cost Americans millions of lost jobs, billions in taxpayer funded bailouts and trillions in last retirement savings.

Financial reform is more urgent now than ever before. And, it's clear that the FCIC needs to hold more hearings, issue more subpoenas and find out even more about what happened. In particular, the failures of former regulators like Christopher Cox need to be exposed. Never again should the people writing and enforcing the rules be beholden to the big banks instead of the public.

Stay tuned today, tomorrow and Friday to the FCIC hearings on C-SPAN2.