world health organization is now urging people around the globe to consider canceling at least some holiday plans. in houston, dr. wesley long agrees. my hope is people saw family members safely during thanksgiving and can delay what would be traditional holiday gatherings maybe till january or february. reporter: and americans are still traveling for the holidays. t.s.a. expects to screen 30 million people between now and january 3. here in new york, no word on if the big new year s eve segregation in times square will go on as planned, margaret. nancy, thank you. overseas, europe is dealing with a covid surge of their own forcing governments to issue new restrictions and lockdowns. cbs s roxana saberi reports from londony omicron infectious are exploding in numbers. reporter: protests against covid restrictions turn tense in london, and in brussels this weekend as demonstrators clashed with police.