Valeant not just a serial acquirer: Fund manager Bill Ackman

Hedge fund manager Bill Ackman appeared on CNBC's " Squawk Box" on Monday, with an update on his efforts to help Valeant Pharmaceuticals takeover Botox-maker Allergan. A week ago, Ackman and Valeant said they'd push to elect a new Allergan board, and were preparing a tender offer to Allergan shareholders.