War a real threat and Europe not ready, warns Poland’s Tusk BBC.comEurope in ‘pre-war era,’ warns Poland’s Prime Minister Tusk, citing Russia’s threat CNNPolish leader warns of ‘prewar era,’ urges European nations to invest in defense Fox NewsEurope must get ready for looming war, Donald Tusk warns The GuardianNATO Ally Issues Chilling Warning About ‘War’ in Europe Newsweek