Sen. Tim Johnson at Bernanke Hearing, Part 2

Tuesday, 17 Jul 2012 | 10:29 AM ET

Sen. Tim Johnson (D-SD) asks Fed Chairman Bernanke about the Libor rate scandal, asking, "what did you know and when did you know it?" Also, Sen. Johnson questions Bernanke about "Operation Twist" and the types of "tools" at the Fed's disposal to help address the weakness in the economy.