Former Russian president Dmitry Medvedev warns Ukraine could 'disappear from the map' and dismisses Joe Biden as 'a strange grandfather with dementia' days after calling for 'Judgement Day'
Dimitry Medvedev warned Ukraine could 'lose the remnants of state sovereignty'
He also said NATO was 'creating a real threat of world conflict' by sending military equipment to Ukraine and troops to Europe's eastern flank
Warning comes after he said Ukraine and West will face a 'Judgement Day' response should they attempt to militarily dispute Russia's control of Crimea