Multiple intelligence sources who spoke to The Washington Times, solely on the condition of anonymity, said concerns about the movement of the North Korean information through Mrs. Clinton’s unsecured server are twofold.
First, spy satellite information is frequently classified at the top-secret level and handled within a special compartment called Talent-Keyhole. This means it is one of the most sensitive forms of intelligence gathered by the U.S...
...Allowing sensitive U.S. intelligence about North Korea to seep into a more insecure private email server has upset the intelligence community because it threatens to expose its methods and assets for gathering intelligence on the secretive communist nation.
I would wager that whichever Clinton hacks passed on this kind of heavily guarded information are not sleeping well these days.
Hat tip: Gateway Pundit.