Electronic Frontier Foundation: Zuckerberg doesn't know who obtained user data

In a nearly five-hour marathon session of testimony before a Senate committee, Facebook CEO Mark Zuckerberg faced tough questions from lawmakers. But the San Francisco based Electronic Frontier Foundation says even Zuckerberg doesn't know who might have obtained users' data. Jana Katsuyama reports.

Top Videos

Most Watched

KTVU Vault

Wild Rides