the u.s. could respond. our teams on the ground in ukraine and at the white house. also developing, canadian police facing off today with protesters, moving in to clear the trucks off that key bridge between the u.s. and canada. the economic impact tonight, as and inspiring demonstrations overseas in paris. could american cities be next? and the warnings about the super and the warnings about the super bowl and the state of the union. tonight, the new setback in the fight against covid. pfizer announcing vaccine authorization for children under 5 put on hold for now. with more than 600,000 children testing positive last week. the reaction from parents, as states increasingly drop their mask mandates. drama at the olympics tonight. two scandals rocking the games. the team figure skating gold medal in question, with russia s 15-year-old star skater testing positive for a banned substance. when we can expect a decision, as the u.s. snowboarding team faces controversy, including alle