Ackman's bark is worse than his bite: Herbalife CFO John DeSimone

Herbalife CFO John DeSimone appeared on "Squawk on the Street" Tuesday morning. For more than a year, the company has been in the crosshairs of hedge fund giant Bill Ackman, who steadfastly insists Herbalife is a "pyramid scheme." On Monday, Ackman told CNBC he was attempting to persuade Carl Icahn to abandon his investment in the company.