WARSAW Polish Prime Minister Donald Tusk delivered a rebuttal Saturday to claims that Europe is in decline and NATO is obsolete, calling it “nonsense” at a ceremony honoring Ukraine at the Munich Security Conference. Tusk said Ukraine’s resistance to Russian aggression was a defining moral test for Europe and the West. “I hear opinions that Europe is on the brink of collapse, that NATO is obsolete, that the time has come for a transactional policy and a concert of great powers,” said Tusk. “