SIGN OF THE TIMES. “National Security Agency has implanted software in nearly 100,000 computers around the world that allows United States to conduct surveillance on those machines and can also create a digital highway for launching cyberattacks; program, code-named Quantum, uses secret radio frequency technology that enables it to enter and alter data in computers even if they are not connected to the Internet.”
http://topics.nytimes.com/top/reference/timestopics/subjects/c/cyberwarfare/