The prime minister has landed in Washington DC ahead of the NATO summit. While there, Sir Keir Starmer is expected to urge fellow leaders to increase their defence spending to combat global threats. It's thought he'll reaffirm Labour's pledge to increase its own to 2.5% of GDP. Report by Covellm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn