Steel workers attend a peace rally at the Illich Iron and Steel Works company in the southeastern Ukrainian city of Mariupol on May 20, 2014. Ukraine's richest man Rinat Akhmetov, an influential force in the country's unrest-hit east, on Tuesday called for a peace rally against the pro-Russian insurgency, just days ahead of a key presidential poll.AFP PHOTO / DIMITAR DILKOFF        (Photo credit should read DIMITAR DILKOFF/AFP/Getty Images)