Russian President Putin vowed to 'knock the teeth out' of nations who grab pieces of the state's vast territory Secretary of State Blinken warned Moscow the North Pole must remain 'free of conflict' at Thursday's summit His Russian counterpart Sergey Lavrov hit back, saying the Kremlim saw 'no grounds' for conflict in the Arctic, but warned the West about militarising on Russia's doorstep and said the country would defend itself Comes as Russia revealed a massive polar military airbase, Nagurskoye, in the Franz Josef Land archipelago It has been heavily militarised with missiles, a radar system and a runway handling...