Russia continues to pay a high cost in troops and equipment during its full-scale invasion, according to Kyiv, the recent figures of which outline losses of several dozen artillery systems—as well as two warplanes. Sunday's update by Ukraine's military noted how two aircraft had been among the equipment losses Russia had suffered over the previous day. This followed what Ukraine's General Staff said was a drone strike on the Morozovsk airfield, a Russian military base in the Rostov region near the Ukrainian border, which is home to Sukhoi Su-27 and Su-34 glide bombers. Kyiv said that the strikes hit warehouses...