omicron crisis. chicago scancelling ling class more than 300,000 students for a fourth day. investigation is under way in one of the deadliest home fires in decades. faulty space heater sparked if inferno in a new york city apartment building that killed 17 people, including eight children. now they want to know if the alarm or door systems malfunctioned as well. the tennis star novak is planning to compete after a judge ruled he can stay in the country. the drama over his visa and vaccine status may not be over. we want to welcome our viewers here in the united states and around the world. i m wolf blitzer.