突然宣布：国家紧急状态！特朗普：加征关税

Group 1 - The U.S. President Trump declared a national emergency and threatened to impose tariffs on goods from countries providing oil to Cuba [1] - Trump announced a potential 50% tariff on Canadian aircraft due to the refusal to certify certain U.S. business jets, which he claims is unfair treatment of U.S. companies [2] - The U.S. plans to open Venezuelan airspace for commercial flights, allowing U.S. citizens to travel safely to Venezuela, following discussions with the Venezuelan interim president [3]