Russia has used hypersonic missiles in its invasion of Ukraine, US President Joe Biden confirmed Monday.
원문출처 : https://www.cnn.com/2022/03/22/europe/biden-russia-hypersonic-missiles-explainer-intl-hnk/index.html
원문출처 : https://www.cnn.com/2022/03/22/europe/biden-russia-hypersonic-missiles-explainer-intl-hnk/index.html