More than 10,000 flights in the US were delayed or canceled on Sunday as snowy weather in Chicago added to the stress for airlines coping with a third day of US government-mandated restrictions on air travel. Transportation Secretary Sean Duffy warned that US air travel would come to a virtual standstill during the Thanksgiving holiday in late November if the government shutdown persists, as more air-traffic controllers opt not to work without paychecks. Bloomberg's Leen Al-Rashdan reports.

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