The UK foreign secretary has justified the supply of Challenger tanks to Ukraine, saying it was designed to bring the war to a quick conclusion and there was a moral imperative to end the war soon due to the casualties and cost. 'This war has been dragging on for a long time already. And now is the time to bring it to a conclusion,' James Cleverly told a Washington thinktank. His remarks seemed designed to encourage the US to step up its own weapons supply and to push back against those Republicans calling for US support for the war to be scaled back