The US Secretary of State has told the Munich Security Conference that Washington is seeking to "revitalise" its alliance with European countries. Marco Rubio said the US would always be a "child of Europe", insisting that his country wants to preserve that relationship rather than end it. The President of the European Commission Ursula von der Leyen said she was "very much reassured" by his remarks, adding that Europe "needs to step up" and take more responsibility for its own security. A day earlier, the leaders of Germany and France had warned of frictions in the transatlantic alliance.