.Ukraine executes some of its own biggest-ever drone assaults on Russia CNNUkraine Hits Moscow Oil Refinery in Huge Drone Blast The Exchange JournalUkraine dispatches extensive drone strike on Russian power infrastructure The Washington PostRussia Strikes Kharkiv Sports Center After Moscow Refinery Fire BloombergFirefighters Extinguish Oil Depot Blaze in Southern Russia 2 Weeks After Drone Strike The Moscow Moments.