Questions grow over how much Omicron affects the protection given by COVID-19 vaccinations, as Pfizer releases the results of a small study on how its shot fares against the new variant. Restrictions are returning to the U.K. amid a surge in cases before the holidays. But it's what happened last year at Christmastime - a government party held during a lockdown - that has prompted an apology from British Prime Minister Boris Johnson. Ottawa is joining the ballooning diplomatic boycott of the Beijing Olympics. Why critics say more needs to be done, and what the decision means for Canadian athletes. Plus, why there's a growing push to rename the Lou Marsh Trophy, the annual award given to Canada's top athlete. And what was the mysterious fireball that lit up the night sky in Alberta?