A swath of arctic air known as a polar vortex is believed to be responsible for frigid temperatures, and dangerous conditions across the northern United States. Brian Walsh, Time magazine senior ... more 
A swath of arctic air known as a polar vortex is believed to be responsible for frigid temperatures, and dangerous conditions across the northern United States. Brian Walsh, Time magazine senior editor, talks to the "CBS This Morning" co-hosts about this weather phenomenon. less 
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Mon, Jan 6, 2014 9:44 AM EST