flights this holiday weekend, as of friday morning, airlines across the globe have collectively canceled more than 2,000 flights, and of those canceled at least 450 have been scheduled within going to, or leaving the united states. a number of airlines say the canceled flights are due to the omicron variant, affecting employees and crews who run operations. as omicron surges around the world, the united kingdom recorded over 100,000 daily covid cases, for the third day in a row, on friday. and while many european countries are considering tighter restrictions, the british prime minister boris johnson is waiting until after christmas to impose any new covid containment measures. that's despite the u.k.'s health care system facing severe pressure due to staffing shortages. for more on, this i'm joined by msnbc correspondent molly hunter in london. good morning and merry christmas to you. what can we expect in terms of restrictions in the u.k. after today? >> hey, ali, i think we can