British scientists say they are unable to determine where the substance used to attack former Russian spy Sergei Skripal and his daughter Yulia was made.
원문출처 : https://www.cnn.com/2018/04/03/europe/skripal-poisoning-uk-nerve-agent-intl/index.html
원문출처 : https://www.cnn.com/2018/04/03/europe/skripal-poisoning-uk-nerve-agent-intl/index.html