nearly half of all covid patients in some major cities were admitted for another condition. >> it is possible for somebody to come in with a broken arm or hand and become a covid positive case. >> exactly >> the u.s. and russia hours away from high stakes talks as vladimir putin sends more troops into kazakhstan to help contain protests there. happening right now tennis star novak djokovic in court. will he be allowed to leave isolation in australia to play? real life super hero a police officer and former airman's new mission. >> this is nbc "nightly news" with kate snow >> good evening. a terrifying scene in new york city this morning. one of the worst fires in the city's recent history. the fire commissioner says it started with a malfunctioning space heater in the bedroom of an apartment. the door to the apartment was left open allowing smoke to spread to every floor of the high rise