6 AM ET: Southwest Airlines chaos, Russia's ultimatum, Dolphins QB concussion & more

Thousands of flights are cancelled again today - and the vast majority are from Southwest Airlines. Russia's foreign minister has issued Ukraine with an ultimatum. China has started giving out Paxlovid as a Covid-19 wave continues. A congressman-elect has admitted to lying on his resume. Plus, Miami Dolphins quarterback Tua Tagovailoa has been put into concussion protocol...again.To learn more about how CNN protects listener privacy, visit cnn.com/privacy