VLADIMIR Putin's top crony and security chief Dmitry Medvedev has issued a disturbing warning to the Western world. He vowed that Russia will do everything in its power to ensure its enemies "disappear from the face of the earth forever". 4 Vladimir Putin attended a ceremony in St Petersburg today for the 80th anniversary of the end to the Leningrad siege Credit: AFP 4 Former Russian president Dmitry Medvedev is a close ally of Putin Credit: EPA 4 An intercontinental ballistic missile launched in northwestern Russia Credit: AP: Russian Defense Ministry The chilling statement comes as global tensions threaten to...