the summer, ukraine was not really even the top topic of that meeting. but things have certainly changed. russia wanted this specific call today with the president to take place monday, the white house insisted today to underscore the urgency. yesterday here at the white house national security adviser jake sullivan underscored the urgency of the situation. listen. >> if you stay, you are assuming risk with no guarantee that there will be any other opportunity to leave. and no prospect of a u.s. military evacuation in the event of a russian invasion. if a russian attack on ukraine proceeds if, it is likely to begin with aerial bombing and missile attacks that could obviously kill civilians without regard to their nationality. >> reporter: americans are told to levey ya private commercial aircraft or private vehicle, and even though russia continues to say there are no definitive plans to invade