Part 1: Bill Ackman talks about Carl Icahn, Dan Loeb and Herbalife on CNBC.
Part 2: Icahn calls in and argues with Bill Ackman and CNBC's Scott Wapner.
Ackman Responds to Icahn in Press Release
Carl Icahn Shares His Thoughts On Bill Ackman's Herbalife Short (Video)
Two Wall Street Titans, and a Seven-Year Tiff (New York Times)