The war in Ukraine is about to enter its fourth year. Will the incoming administration in Washington bring it to an end — and what will that mean for the millions of refugees inside the war-torn country and the territories Russia occupies?

Host Anne McElvoy talks to Tom Fletcher, United Nations undersecretary-general for humanitarian affairs and emergency relief coordinator, who has been in Ukraine to survey the toll the conflict has taken on the Ukrainian people and its infrastructure.

They also discuss the huge task facing the U.N. following a cease-fire in Gaza. As a former senior foreign policy adviser to three British prime ministers — Tony Blair, Gordon Brown and David Cameron — Fletcher has advice for Peter Mandelson, who is about to become Britain's next ambassador to the United States, on how to handle Donald Trump.

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