president biden, who will soon arrive in lond don for the start of a high-stakes trip to london. during the five-day visit, biden will meet with leaders in the uk and finland. and in between those two stops, attend a critical nato summit. a meeting that will be keenly focussed on russia s war in ukraine. a conflict right on nato s borders. the summit comes just days after president biden approved giving controversial cluster munitions to aid ukraine in its fight against russia. munitions that nearly all nato members have banned. cnn s arlette saenz is traveling just ahead of the president s arrival, already there in london. what is first on the president s agenda? reporter: well, fred, president biden will arrive here in london in just a few hours. and tomorrow he will meet with british prime minister rishi sunic before heading over to windsor castle for an engagement with king charles. the first time the two will be meeting since his coronation in