WATCH: Zero Days, New America

The days of tanks and high-powered munitions as primary weapons of war may soon be fading into the past. What has the potential to quickly overtake them is a form of cyber warfare that now lays dormant on countless computers worldwide, with the power to attack national institutions and infrastructure before war is ever declared. Far beyond hacking or spying, this sophisticated malware, a computer virus known as Stuxnet, is unregulated, veiled in secrecy, and, without public discourse, changing the nature of warfare. 

Karen Greenberg spoke with Alex Gibney on his newest film, Zero Days, and other national security experts on the digital future of war, national security, and the democratic process.