.Ukraine carries out some of its own biggest-ever drone assaults on Russia CNNUkraine Attacks Moscow Oil Refinery in Gigantic Drone Blast The Wall Street JournalUkraine catapults enormous drone strike on Russian electricity infrastructure The Washington PostRussia Strikes Kharkiv Athletics Center After Moscow Refinery Fire BloombergFirefighters Extinguish Oil Depot Blaze in Southern Russia 2 Weeks After Drone Strike The Moscow Times.