Yuri KostenkoYuri Kostenko is a politician and leader of the Ukrainian People's Party. From 1990 to 2014 he was a member of the parliament of Ukraine and from 1992 to 1998 held cabinet ministerships with portfolios governing environmental protection and nuclear sfety. Kostenko was a top-level representative of Ukraine in the negotiations with the Western powers and Russia on the denuclearization of Ukraine in the 1990s. Read More Read Less