Russia's warplanes bombed Lviv and its missiles struck Kyiv and Kharkiv on Saturday, as Moscow followed through on a threat to launch more long-range attacks on Ukrainian cities after its Black Sea Fleet's flagship was sunk. In besieged Mariupol, scene of the war's heaviest fighting and worst humanitarian catastrophe, Russian troops pressed recent advances, hoping to make up for their failure to capture Kyiv by seizing their first big prize of the war. Moscow said its planes had struck a tank repair factory in the capital, where an explosion was heard and smoke seen in the southeastern Darnytskyi district. Kyiv's...