Tim Cook: Social media used "to manipulate people"

Apple CEO Tim Cook said Russia-bought ads are only "0.1% of the issue" with social media platforms like Facebook and Twitter. The bigger concern is that social media can be used to divide people and spread fake news to mass audiences, he said.

One tax thing: Corporate "tax reform is sorely needed in this country ... it should have been fixed years ago. But let's get it done now."

Go deeper: Here are the Facebook ads Russia bought during the 2016 campaigns