Per C-SPAN

Rep Alan Grayson: "... one of the entries on the balance sheet is, under assets, Central Bank liquidity swaps which shows an increase from the end of 2007 from $24 billion to $553 billion and change at the end of 2008. What's that?"

Ben Bernanke: "Those were swaps... done with foreign central banks..." he then explained how they lent money to other central banks, for them to distribute to other banks in exchange, for other currencies.

Rep Alan Grayson: "So who got the money?"

Ben Bernanke: "Two financial institutions in Europe..."

Rep Alan Grayson: "Which ones?"

Ben Bernanke: "I don't know."