.Ukraine performs among its own biggest-ever drone strikes on Russia CNNUkraine Hits Moscow Oil Refinery in Large Drone Torrent The Wall Street JournalUkraine launches massive drone assault on Russian energy infrastructure The Washington PostRussia Attacks Kharkiv Sports Center After Moscow Refinery Fire BloombergFirefighters Extinguish Oil Depot Blaze in Southern Russia 2 Weeks After Drone Strike The Moscow Moments.