KNOW IT ALL: Wednesday's Top 6 Stories at NBC News

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Good morning. Here are some of the stories we’re following today:

1. At least 11 dead in French magazine terror attack

A gunman opened fire Wednesday at the offices of Charlie Hebdo, a satirical news magazine that has published cartoons of the Muslim Prophet Muhammad. At least 11 people were killed and four others were critically injured in what France's president called a "terrorist attack." Benoit Bringer, a journalist with Agence Premiere Ligne who saw the attack, told the iTele network he saw several masked men armed with machine guns. Television footage from the scene showed a police car with at last 10 bullet holes in the windshield. Read more in NEWS.

2. No relief from bone-chilling cold

Dangerously cold air is racing across the country, with some 17 states and 120 million Americans in the cross-hairs Wednesday into Thursday. The storm, which includes snow in some areas, is carrying gusty winds. Wind-chill forecasts for Wednesday neared minus-50 in northern Minnesota, minus-42 in Fargo, North Dakota, and minus-28 in Chicago. The Buffalo, New York, area — where a massive snowstorm led to record flooding that killed 13 people in November — could get as much as 16 inches of new snow, forecasters said. Read more in NEWS.

3. Divers find AirAsia jet’s tail section

Search and rescue officials got a break Wednesday when divers reported finding the tail section of the crashed AirAsia passenger jet in the Java Sea. The find — about 110 feet down — is significant because this part of the wreckage could contain the plane's "black box" recorders. These devices contain voice and data information and could be crucial in determining what happened to Flight QZ8501 and its 162 passengers and crew when the plane crashed Dec. 28. Read more in NEWS.

4. FBI seeks suspects in explosion near NAACP office

An explosion was set off outside of an NAACP chapter office in Colorado Springs, Colorado, on Tuesday. While no one was injured, the FBI is still looking for suspects and says the improvised explosive device detonated next to a gas can but the can did not ignite. Officials couldn't immediately say if the nation's oldest civil rights organization was the target of the act. A witness described a possible person of interest as a balding white man in his 40s who may be driving a dirty pickup truck. Read more in NEWS.

5. Bill Cosby’s TV wife defends comedian

Phylicia Rashad, who played Cosby's wife on the eponymous hit sitcom, says the women claiming he sexually assaulted them in past decades are part of an "orchestrated" smear campaign. "Forget these women," Rashad told the entertainment website ShowBiz411 in an interview posted late Tuesday. "What you're seeing is the destruction of a legacy. And I think it's orchestrated." The comedian, who has not been criminally charged, has denied assaulting the women and also has accused one of trying to extort him. Read more in POP CULTURE.

6. Climbers aim to conquer Yosemite mountain

Friends Tommy Caldwell and Kevin Jorgeson are living on the edge — literally. The climbing duo is in the midst of scaling the more than half-a-mile-high Dawn Wall in California's Yosemite National Park — without gear and using only their hands and feet. The mountainside is perhaps the most forbidding challenge on the famous El Capitan mountain, and while it has been conquered using assistance, it has never been "free-climbed." Read more in NEWS.

And now this ...

Long popular in the U.K. and Australia, Starbucks is now offering the Flat White. It's like a latte but with less milk and more espresso. Yeah, you heard us right.