As Russia hits Kharkiv with more deadly bombs, Ukrainian strikes kill 6 in Russia and Crimea PBS NewsHourKremlin blames US for ‘barbaric’ ATACMS missile attack on Crimea ReutersRussia-Ukraine war: List of key events, day 850 Al Jazeera EnglishRussia Summons US Ambassador Over Ukrainian Strike On Crimea Barron’sRussia blames US after Ukrainian attack on Crimea leaves several dead, wounded Fox News