BUCHAREST, April 13 - NATO should play a bigger role in security in the Black Sea, and integrate Ukraine's air and missile defences with those of alliance members, Ukrainian Foreign Minister Dmytro Kuleba said on Thursday. Since last year's invasion, Moscow has seized the entire coast of the Sea of Azov that opens into the Black Sea, but its advance along the Black Sea coast was halted about 130 km (80 miles) east of Ukraine's main port Odesa. Applications by Ukraine and Georgia to join NATO would have the same impact on the Black Sea, where Bulgaria, Romania and Turkey are already members