Bernanke says that Congress can have access to an audit at any time. Sure it can – an audit vetted and sanitized by the FED, where no one knows which banks got what bailout money. This is an audit in the way a CIA audit is an audit. The main differences are these: (1) the CIA legally operates only outside the borders of the United States; (2) the CIA can assassinate any uncooperative Congressman who insists on a full audit. The FED does not have the second power, but it is not limited by the first restriction.
What has Bernanke panicked is this: the Federal Reserve has bailed out the biggest banks and has let almost 100 little ones die. This is crony capitalism at its most notorious.