Oleg Smolenkov knows the dangers of leaks. For nearly a decade, the Russian official was the CIA’s most valuable spy in the Kremlin. From there, the agency quietly exfiltrated Mr. Smolenkov, his wife and three young children to a safe house in the U.S. intelligence appears to have penetrated nearly every Russian military body, including the General Staff, the Defense Ministry and the GRU military intelligence agency, as well as the private mercenary group Wagner,” wrote Russia’s independent, English-language Moscow Times this week. Agents of Russia’s FSB are undoubtedly now engaged in a frantic spy hunt.

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