.Ukraine performs among its own biggest-ever drone assaults on Russia CNNUkraine Hits Moscow Oil Refinery in Enormous Drone Blast The Exchange JournalUkraine dispatches large drone attack on Russian electricity infrastructure The Washington PostRussia Strikes Kharkiv Athletics Midpoint After Moscow Refinery Fire BloombergFirefighters Extinguish Oil Depot Blaze in Southern Russia 2 Weeks After Drone Strike The Moscow Moments.