Viktor Bout: Russia hopeful for arms dealer prisoner swap with US- PublishedRussia is hopeful it can agree a prisoner swap with the US that would include infamous arms trafficker Viktor Bout, known as the Merchant of Death.On Friday Mr Ryabkov said a "common denominator" had not yet been reached between the US and Russia, but "it is undeniable that Viktor Bout is among those who are being discussed [for exchange] and we certainly count on a positive result".He was sentenced to 25 years in prison after being found guilty of conspiracy to kill Americans and US officials, delivering anti-aircraft missiles and aiding a terrorist organisation.There have been reports in US media suggesting Russia was interested in exchanging the arms dealer for basketball star Brittney Griner.In the first interview since his arrest, Mr Whelan described his time locked up as a "very, very grim existence"."