Ukraine Targets Critical Russian Air Bases in Mass Drone Raids NewsweekUkraine conducts drone attack on Russian airbase in Volgograd region, source says ReutersA Ukrainian Drone Attack Sparks a Fire at a Russian Military Facility Military.comRussia-Ukraine war: List of key events, day 909 Al Jazeera EnglishMoscow comes under one of Ukraine’s largest drone attacks as fighting rages in Kursk, eastern Ukraine PBS NewsHour