Dmitry Firtash, a Ukrainian billionaire with business links to Russian President Vladimir Putin’s inner circle, talks about fighting his extradition to the U.S., his native Ukraine and his relationship with his business partners back in Russia. Firtash, who was a leading business figure until the street revolution broke out there in 2014, spoke exclusively with Bloomberg’s Ryan Chilcote in Vienna where he has lived ever since 2014 as the U.S. pushes to extradite him over bribery charges.