Croatia's Prime Minister Andrej Plenkovic, center, is greeted by Greece's Prime Minister Kyriakos Mitsotakis, right, during a round table meeting at an EU summit in Brussels, Thursday, April 18, 2024. European Union leaders vowed on Wednesday to ramp up sanctions against Iran as concern grows that Tehran's unprecedented attack on Israel could fuel a wider war in the Middle East. (AP Photo/Omar Havana)