US President Joe Biden has landed in the UK ahead of a Nato summit in Lithuania later this week – which comes after several allies questioned his call to send cluster bombs to Ukraine.
The UK and Canada are among those who voiced concern about supplying the bombs, which are widely banned because of the danger they pose to civilians.
The US says they are needed because Ukraine’s weapon stocks are dwindling.
On Monday, Mr Biden will meet UK Prime Minister Rishi Sunak.
The two men are expected to discuss various issues, including the war in Ukraine.