Four days after Russia invaded Ukraine, President Joe Biden's national security adviser Jake Sullivan authorized a team of officials to quietly map out potential ways the US could respond if Russian President Vladimir Putin took an extreme step, including deploying chemical, biological or nuclear weapons, a senior administration official told CNN.


원문출처 : https://www.cnn.com/2022/03/24/politics/us-planning-on-how-to-counter-putin/index.html