How Silicon Valley became an espionage target

As investigations into possible Russian interference in the 2016 elections continue, a new report by POLITICO reveals that Chinese and Russian spies have been targeting Silicon Valley for trade secrets and technology. But firms have sought to downplay or conceal the extent of espionage, complicating counterintelligence efforts. Zach Dorfman of POLITICO joins Hari Sreenivasan for more.