Children of freed sleeper agents learned they were Russians on the flight, Kremlin says ReutersWhy Putin thinks he’s the winner in Russia’s prisoner swap with the West BBC.comWho Is Vadim Krasikov? The Dark Figure at the Center of Putin’s Prisoner-Swap Demands The Wall Street JournalConvicted Assassin Is a Russian Security Agent, Kremlin Acknowledges The New York TimesGermany’s ‘Deal With The Devil’ In Russia Prisoner Swap Barron’s