Security technologist Bruce Schneier's latest book, Click Here to Kill Everybody: Security and Survival in a Hyper-connected World, argues that it won't be long before everything modern society relies on will be computerized and on the internet. This drastic expansion of the so-called "internet of things," Schneier contends, vastly increases the risk of cyberattack. To help figure out just how concerned you should be, last Thursday, Benjamin Wittes sat down with Schneier. They talked about what it would mean to live in a world where everything, including Ben's shirt, was a computer, and how Schneier's latest work adds to his decades of advocacy for principled government regulation and oversight of "smart devices."