Shadow banking has grown since the financial crisis. Sr. Producer Paddy Hirsch casts a light on the system and explains why it's so dangerous.

The shadow banking system is a key component of the U.S. economy, but the financial crisis has frozen it solid. Senior Editor Paddy Hirsch explains what shadow banking is and why it's important enough to warrant its own bailout, called the Term Asset-Backed Securities Loan Facility, or TALF.