Open this photo in gallery: A Ukrainian serviceman walks near destroyed building, amid Russia's attack on Ukraine, in the frontline town of Chasiv Yar in Donetsk region, Ukraine, on March 5.Oleksandr Ratushniak/Reuters Russian paratroopers have reached the eastern edge of the Ukrainian town of Chasiv Yar, which Kyiv’s top commander says Moscow wants taken by May 9, the date when Russia marks the Soviet victory over Nazi Germany. The Kremlin has not acknowledged setting such a deadline, but Russian forces are pummelling the strategically-important Ukrainian town’s defenders with artillery, drone and air strikes. Colonel General Oleksandr Syrskyi, Ukraine’s top commander,...