The UN reports that Ukraine is the fastest growing refugee crisis since World War II. CNN's Jim Sciutto speaks to one of countless Ukrainian mothers who are fleeing their homes with their children, as men of military age are required to stay behind and defend their country from Russian armed forces. | CNN

National security adviser Jake Sullivan tells CNN's Jake Tapper that the US believes Russia could launch an invasion of Ukraine before the end of the Beijing Winter Olympics this week, but is still holding out hope diplomacy can prevail. | CNN