The Balkan country is useful for so many Russian agencies and individuals Is it getting harder for Serbian president Aleksandar Vučić to maintain his balancing act between Moscow and the West? Why else, after all, would Russia’s Foreign Intelligence Service (SVR) suddenly revive a year-old story about covert arms supplies to Ukraine? Back in June of last year, the Financial Times splashed the story that Serbia had exported around €800 million ($900 million) worth of ammunition to third parties