From Spiegel:  For years, from his senior position in Estonia’s Defense Ministry, Herman Simm leaked highly sensitive NATO intelligence and the names of Western spies to Russia’s foreign intelligence service. In a classified damage analysis, NATO concludes that the former KGB colonel was one of the "most damaging" spies in the history of the alliance. …

This is the same man whom NATO, in a classified 141-page report, has recognized as the spy who was "most damaging in Alliance history." The report alleges that Simm, as the former head of security at the Estonian Defense Ministry, had access to most of the classified NATO documents his country received after joining the alliance in the spring of 2004. Until his arrest, in September 2008, he is believed to have secretly handed over thousands of those documents to the Russians. Some of these contained highly sensitive information about NATO’s secret defense policies, "including installation, maintenance, procurement and use of cryptographic systems." …

According to the classified NATO report, the master spy also "compromised a wide range of NATO intelligence reports and analyses," including ones related to fighting terrorism, secret military plans and counterespionage. Never before, the NATO analysis concludes, has a spy betrayed such a large volume of military secrets for such a long time.  (photo: Sicherheitspolizei Estland)

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