omicron. friendly fire. former president trump booed by an audience full of his supporters. what he said to spark that reaction. plus, slow your roll out. airplanemakers raising a major red flag about how new high-speed cell phone technology could interfere with your next flight. and welcome to the lead. i m jim sciutto in for jake tapper. breaking news in our health lead. president joe biden just moments ago rolled out a new battle plan against covid and a warning as omicron becomes the dominant variant in the u.s. if you re not fully vaccinated, you have good reason to be concerned. you are at a high risk of getting sick. and if you get sick, you re likely to spread it other tos, including friends and family. biden is making 500 million, half a billion, rapid tests free