Flight disruptions continue with thousands more cancellations as Omicron thins airline crews.
At least 2,400 more flights were canceled globally on Monday, including about 900 U.S. flights.
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Dutch streets deserted as snap Christmas COVID lockdown starts
The Netherlands is requiring all nonessential businesses to close until at least January 14 to reduce transmission of omicron.
National park crowds across the West are braving intense heat and hazy skies
Travelers rolling up to storied mountain ranges in their campers are finding peaks shrouded in haze from fires and record-setting temperatures.