Has Nato been a success for Starmer?

Keir Starmer is on his first big diplomatic trip to Washington, attending the Nato summit. He has called on member countries to increase defence spending, had a meeting with Volodymyr Zelensky, and enjoyed a dinner with Joe Biden - all in his first week of the job. How is the trip going, are there any tensions arising, and has it been a success for the new PM?  Oscar Edmondson discusses with James Heale and Sophia Gaston, head of foreign policy at Policy Exchange.