Americans Paul Whelan, Alsu Kurmasheva, Evan Gershkovich, and others are freed from Russian prisons in a deal involving 16 political prisoners exchanged for eight individuals requested by the Kremlin. With Liam Scott and Cristina Caicedo Smit, Jessica Jerreat reports. Patsy Widakuswara contributed. Cameras: Martin Bubenik, Krystof Maixner, Hoshang Fahim.
