"Kaspersky: In the Soviet days, we used to joke that an optimist learns English because he is hoping that the country will open up, that a pessimist learns Chinese because he’s afraid that the Chinese will conquer us, and that the realist learns to use a Kalashnikov. These days, the optimist learns Chinese, the pessimist learns Arabic…
SPIEGEL: …and the realist?
Kaspersky: …keeps practicing with his Kalashnikov. Seriously. Even the Americans are now openly saying that they would respond to a large-scale, destructive Internet attack with a classic military strike. But what will they do if the cyber attack is launched against the United States from within their own country? Everything depends on computers these days: the energy supply, airplanes, trains. I’m worried that the Net will soon become a war zone, a platform for professional attacks on critical infrastructure.
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~ Evgeny Kaspersky in an interview with Der Speigel (via Schneier on Security)