He is a man of many names: “Kinder Surprise”, after the popular chocolate eggs given to children throughout Europe, “the little human computer”, “Nuke Surprise”, but Sergey Kiriyenko’s front-row seat during Vladimir Putin’s contested annexation of four Ukrainian regions on Friday inspired his latest nickname: “Viceroy of the Donbas”. Who is this one-time prime minister who put Putin on the path to the presidency by handing him the top job at Russia’s intelligence agency, the FSB?