On September 20, 2012 the U.S. Senate Permanent Subcommittee On Investigations held a meeting on Offshore Profit Shifting. The full 4.5 hour video can be found here
For some highlights of the testimony, see:
Stephen Shay (7 minutes)
Reuven S. Avi-Yonah (7 minutes)
Jack Ciesielski (7 minutes)
