John Simpson, in discussion with the BBC's unparalleled range of experts across the world, examines what Ukraine can do to win back American military support in its war with Russia, explores whether a European army could provide a bulwark against Russia and looks at how Donald Trump and Elon Musk have waded into the controversy over South Africa’s land inequality.

South Africa has voted in favour of a General Assembly resolution, presented by the United States of America with amendments by the European Union, which reiterates that the principal purpose of the United Nations is to maintain international peace and security and to peacefully settle disputes.