Tusk calls for increasing European military potential to counter the Russian after Putin's threats. Russian President Vladimir Putin's threat to NATO countries if they send ground troops to Ukraine is real for countries like Poland that formed the Alliance to the East in 1997.

Poland and the Baltic countries have been warning for months that Germany, France and the rest of Europe would also have to maximize arms production. The reason is simple: Europe is currently unable to produce enough weapons for either Ukraine or itself. "There is a principle known since ancient times: if you want peace, prepare for war," said German MP Norbert Rötteng.