The world is on the precipice of cyber catastrophe, and everything is vulnerable, including our government, nuclear weapons, elections, power grid, hospitals, and cell phones. 'New York Times' cybersecurity reporter Nicole Perlroth explains how the U.S. went from having the world's strongest cyber arsenal to becoming so vulnerable to cyber attack. "We have to stop leaving gaping holes in software that could be used by adversaries to pull off some of these attacks," she says. Perlroth's new book is "This Is How They Tell Me The World Ends."