How can U.S. fight cyber attacks?
04:51Pres. Obama vowed to respond after the U.S. intelligence community says Russian hacks interfered in the 2016 election. MSNBC's Lawrence O'Donnell speaks to a former director of U.S. CyberCommand.
Pres. Obama vowed to respond after the U.S. intelligence community says Russian hacks interfered in the 2016 election. MSNBC's Lawrence O'Donnell speaks to a former director of U.S. CyberCommand.
