According to the Serbian President, NATO’s potential plans for so-called preemptive strikes on Russia pose a serious threat BELGRADE, December 2. /TASS/. The progress of Russian forces in the zone of the special military operation is making NATO leadership very nervous, Serbian President Aleksandar Vucic said. "Russian forces’ progress on the frontline, which was acknowledged by the NATO secretary general and must be acknowledged by anyone who is realistic about the situation, is obvious after