“We are in the window when an invasion could begin at any time should Vladimir Putin decide to order it. I will not comment on the details of our intelligence information, but I do want to be clear: It could begin during the Olympics. We encourage all American citizens who remain in Ukraine to depart immediately. We want to be crystal clear on this point. Any American in Ukraine should leave as soon as possible and in any event, in the next 24 to 48 hours. We obviously cannot predict the future. We don’t know exactly what is going to happen, but the risk is now high enough and the threat is now immediate enough that this is what prudence demands.