The Kremlin on Friday confirmed that Vadim Krasikov, freed by Germany in Thursday’s prisoner swap deal with the West, is an operative with Russia’s FSB security service. Moscow also said that the children of an undercover spy couple released by Slovenia did not even know they were Russian until they boarded the plane back to Moscow. “Krasikov is an FSB employee,” Kremlin spokesman Dmitry Peskov told reporters on Friday, adding that he served in the agency’s elite and secretive “Alpha” unit. Peskov also said that Krasikov “served with some of the people working in the president’s security detai…