Russia 🇷🇺 @Russia
#OTD in 2020 🇷🇺 unique Russian AI-driven deep submersible #Vityaz reached the #ChallengerDeep in the Mariana Trench - 10K+ meters below sea level. First of its class to manage that. It planted #Victory Banner in a capsule to mark the Anniversary of the Victory over Nazism. https://t.co/dC07MICPkL — PolitiTweet.org