Cyber Terrorism Is Now Seen as a Real Threat -- Wall Street JournalQuaint details such as letters written in invisible ink, rendezvous in parks and buried stashes of cash have made the alleged Russian spies now under arrest in the U.S. sound very old fashioned. Moscow chose to add to that impression, with the Foreign Ministry criticizing the U.S. action as being "in the spirit of Cold War-era spy stories."
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My Comment: If cyber security/espionage/hacking/etc. is your thing, this article is a must read for you.