President Joe Biden is in Europe this week for the NATO summit in Lithuania, and has already held a meeting with U.K. Prime Minister Rishi Sunak. The U.S. and its NATO allies are looking to maintain a unified voice in support of Ukraine, and Biden will also meet with King Charles III to discuss the war and revise plans for dealing with Russian aggression. The trip will conclude in Helsinki, Finland, where Biden will celebrate the expanding alliance with Finland as the newest member of NATO.