The gray zone separating "cyber attacks" by hackers on computer and communications networks from war waged with bayonet, bomb or missile attacks is narrowing, and narrowing dramatically.

Last week, the head of U.S. Strategic Command (STRATCOM), U.S. Air Force Gen. Kevin Chilton, noted that American leaders cannot rule out using "real world" military force (e.g., air strikes and ground attacks) against an enemy who attacks and disrupts critical cyber networks.

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