Journalism of Courage
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Sub-zero temperatures in US as nation braces for winter storm on Christmas weekend

A dangerously frigid arctic air mass gripped a vast expanse of the United States on Thursday ahead of what could be one of the coldest Christmas Days on record, as a looming winter storm threatened to upend travel plans for millions of Americans. In pic, an American Airlines plane is seen de-iced while high winds whip around 7.5 inches of new snow at Minneapolis-St. Paul International Airport. (AP)