DONETSK – A self-proclaimed leader of the pro-Russian separatists in eastern Ukraine has pledged to take control of cities controlled by Ukraine’s government. Aleksandr Zakharchenko said on May 29 in the rebel-controlled Ukrainian city of Donetsk that separatist forces will regain control over Sloviansk, Kostiantynivka and Krasnoarmiysk, which were briefly held by the rebels last...