The high stakes talks which freed some of Putin's harshest critics. The biggest prisoner exchange between Russia and the West since the Cold War era took place last week, with 24 people released in total, including former US Marine Paul Whelan, and journalist Evan Gershkovich.

In this episode, Azadeh Moshiri speaks to the BBC's Eastern Europe correspondent Sarah Rainsford and our Security correspondent Gordon Corera.

The Global Story brings you trusted insights from BBC journalists worldwide. We want your ideas, stories and experiences to help us understand and tell #TheGlobalStory. Email us at theglobalstory@bbc.com You can also message us or leave a voice note via WhatsApp on +44 330 123 9480.

This episode was made by Richard Moran and Tse Yin Lee. The technical producer was Mike Regaard. The assistant editor is Sergi Forcada Freixas and the senior news editor is Richard Fenton-Smith.

#77: Dr. Jill presents sneak peek of iNOS path with Bob Miller