Ukraine's top intelligence agency deeply infiltrated by Russian spies

Pro-Russian separatists with Russian national flags storm the regional office of the Security Service of Ukraine in the eastern city of Luhansk on April 6, 2014.

KIEV, Ukraine – On a morning earlier this year, Ukraine’s top intelligence officials woke up to discover that the country's spy agency had been ransacked and torched by intruders who seemed to know what they were looking for.

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