.Ukraine executes among its own biggest-ever drone strikes on Russia CNNUkraine Hits Moscow Oil Refinery in Gigantic Drone Blast The Wall Street JournalUkraine catapults huge drone assault on Russian electricity infrastructure The Washington PostRussia Strikes Kharkiv Sports Midpoint After Moscow Refinery Fire BloombergFirefighters Extinguish Oil Depot Blaze in Southern Russia 2 Weeks After Drone Strike The Moscow Moments.