(ANSA) - BELGRADE, 10 NOV - "Here in Varna, on the Black Sea coast, I want to send a clear message: Europe is with Bulgaria. We are increasing our efforts to strengthen maritime surveillance, protect critical infrastructure, and help restore and safeguard freedom of navigation in the Black Sea," said European Commission President Ursula von der Leyen on the second day of her mission to the region. (ANSA).