Mark Zuckerberg testifies about Facebook, big data, and influence. Patch Tuesday notes. Deterrence or open conflict in cyberspace?

Today we're following all things Facebook—it's four o'clock: do you know where your data are? We're betting no. Neither side of the aisle seems content with the answers Mr. Zuckerberg gave to the Senate panel. He's speaking before a House panel today. Patch Tuesday notes. Cyber tensions continue to rise as kinetic and chemical tensions rise between Russia and the West. Justin Harvey from Accenture, discussing cyber hygiene blind spots. Guest is Nahuel Sanchez from Onapsis on vulnerable password recovery systems. Learn more about your ad choices. Visit megaphone.fm/adchoices