where the 95 year old monarch is in isolation after catching covid. >> duncan: plus, deadly crash. frantic efforts to save officers on board this downed police helicopter in california. closing ceremony, the beijing winter olympics comes to an end with a historic flag bearer for team u.s.a. and later, call it "nascar on ice," in the land of 10,000 frozen lakes. ♪ ♪ ♪ this is the "cbs weekend news" from new york, with jericka duncan. ♪ ♪ ♪ >> duncan: good evening and thanks for watching. tonight americans in russia are being urged to have an evacuation plan out of the country. the u.s. embassy warns of the threat of attacks in public places, including moscow and along russia's border with ukraine. that's where the kremlin has amassed a massive military force in advance of an expected invasion of its former soviet neighbor. cbs news has also learned that