Secretly shot video tells the story of an alleged spy ring at work in Bulgaria's capital.
원문출처 : https://www.cnn.com/2021/03/24/europe/bulgaria-russian-spy-ring-cmd-intl/index.html
원문출처 : https://www.cnn.com/2021/03/24/europe/bulgaria-russian-spy-ring-cmd-intl/index.html