Donald Trump has just met both Vladimir Putin and Volodymyr Zelenskyy in the same week - two leaders locked in a war that has reshaped global security. For Putin, the meeting with Trump offered legitimacy and a chance to show that Russia is still a power the US must engage with. For Zelenskyy, it was about survival, pressing Trump to keep American support flowing as Ukraine fights for its future.So what really happened behind those closed doors and what does it mean for NATO, Europe and the wider world? In this episode of The Fourcast, Matt Frei speaks to Emily Ferris from RUSI and William Alberque, a specialist on arms control and NATO, to explore what Trump’s diplomacy tells us about the next phase of the war - and America’s role in it.