Bill Browder is a financier turned anti-corruption campaigner. He made his fortune in post-Soviet Russia before falling afoul of Putin.
We last spoke to him back in 2018. Back then, few imagined Russia would dare carry out a full-scale invasion of Ukraine. But Browder wasn't one of them.
Now, with Donald Trump's return to the White House just weeks away, the newly knighted Browder tell us world leaders must act. He joins us to explain why Putin remains such a huge threat to Ukraine and the world.