Zelensky's visit to London followed his trip to Berlin, Germany, where on Wednesday he met with European leaders -- and spoke virtually with Trump -- to hammer out Ukraine's key demands in any peace negotiations to end Moscow's full-scale invasion, which began in February 2022.

President Donald Trump will meet with Russian President Vladimir Putin on Friday in Alaska to attempt to broker a ceasefire in Ukraine. The meeting will take place at a military base in Alaska that was crucial to countering the Soviet Union during the height of Cold War and still plays a role today.