\"With their unprecedented amounts of capital and their savvy understanding of business, activist investors Carl Icahn and Bill Ackman have the ability to move markets and change the fortunes of investors, workers, and even large companies with the flick of a wrist. But what happens when they run into the one thing in business they can\'t control: each other? On January 25, 2013, Scott Wapner, the host of CNBC\'s The Halftime Report, found out firsthand.