You probably remember just where you were when billionaires and activist investors Carl Icahn and Bill Ackman squared off on CNBC. Full of insults, name calling, even some swearing as the two went at it over past deals and Ackman's short on Herbalife. Joining me now is Scott Wapner, host of CNBC's Halftime Report, the man in the middle of the phone battle and the author of the new book - "WHEN THE WOLVES BITE - Two Billionaires, One Company, and an Epic Wall Street Battle."