Flight delays and cancellations mount
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Transportation Secretary Sean Duffy warned as many as 20% of flights could be canceled if the government shutdown drags on.
San Francisco International Airport was among the major U.S. air-travel hubs to face cancellations as the federal government places limits on air travel.
With flight reductions beginning Friday at 40 major U.S. airports, Transportation Secretary Sean Duffy said safety is his top priority — but he declined to share information about the data that led to the decision to cut capacity.