Once cyber crosses into the realm of the physical, then it's a physical attack, but it starts with cyber. And the idea of a cyber attack being able to take control of machines - that becomes a scary process.

It's no surprise that hackers working for North Korea, Iran's mullahs, Vladimir V. Putin in Russia, and the People's Liberation Army of China have all learned that the great advantage of cyberweapons is that they are the opposite of a nuke: hard to detect, easy to deny, and increasingly finely targeted.

Because our government has been so incompetent at protecting its highly sophisticated cyberweapons, those weapons have been stolen out of the electronic vaults of the National Security Agency and the C.I.A. and shot right back at us.

David E. Sanger Quotes