In a war dominated by the unexpected, few imagined Ukraine’s fourth year at war would so firmly now question the security of all of Europe.

In a dramatic shift in transatlantic relations under President Donald Trump, the United States split with its European allies by refusing to blame Russia for its invasion of Ukraine in votes on three U.

John Simpson, in discussion with the BBC's unparalleled range of experts across the world, analyses whether Russia’s war in Ukraine is nearing an endgame, examines the implications of the surge in support for the right in the German elections and looks at the huge increase in government surveillance under the Taliban in Afghanistan.

According to the New York Times, US President Donald Trump's administration may stop all assistance to Ukraine, including indirect support. As reported by the New York Times on Friday 28 February, a Trump administration official said that all US aid to Ukraine - including recent deliveries of munitions and equipment authorised and funded under Joe Biden's administration - could be cancelled in the near future.

As negotiations to end the Ukraine war rumble on, Donald Trump seems equally interested in talking about the past, repeatedly claiming that the US has given much more aid to Ukraine than Europe has, and that Europe’s aid took the form of a loan that they’ll be getting back.