FILE PHOTO: Vladimir Potanin, co-owner of Norilsk Nickel, attends an agreement signing ceremony with the Krasnoyarsk region’s government, in Moscow, Russia December 12, 2017. REUTERS/Sergei Karpukhin/File Photo
FILE PHOTO: Vladimir Potanin, co-owner of Norilsk Nickel, attends an agreement signing ceremony with the Krasnoyarsk region’s government, in Moscow, Russia December 12, 2017. REUTERS/Sergei Karpukhin/File Photo