The National Weather Service has issued extreme cold warnings for millions of Americans from the Canadian border to Texas. CBS News correspondent Nicole Valdes reports on the historic low temperatures.

Happily ever after? The case for marriage: Peter Copeland, Andrea Mrozek & Peter Jon Mitchell
No presence, no power. Why Canada must build ties in Washington: Ian Ching in Canadian Affairs
Polar vortex causes extreme cold warnings across 11 states [Video]
Categories

The Rebirth of Antisemitism in the 21st Century: David Hirsh in conversation with Casey Babb
Goodbye Silver Platter, Election Special: Brian Lee Crowley on Power Struggle