World leaders are wrapping up another UN General Assembly, a summit reflecting on a year of mounting challenges for UN nations, from the climate crisis to the war in Ukraine. As Kyiv’s counteroffensive continues, President Zelensky used his address to the UN to appeal for support and is now setting his sights on further assistance from Washington as he makes his case at the Capitol. But the leader is facing diplomatic setbacks, as Republicans in Congress threaten to cut off aid and neighboring country Poland announces it will no longer send weapons to Ukraine. US Ambassador to NATO Kurt Volker joins the show from Washington DC. 

Also on today's show: Qatari Prime Minister Mohammed bin Abdulrahman bin Jassim Al Thani; acting US Deputy Secretary of State Victoria Nuland; Law professor Tim Wu 

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