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

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

1. French town becomes ‘war zone’ in manhunt

French police on Friday were surrounding the two suspects in Wednesday's magazine massacre that left 12 dead. A Paris police spokesman told NBC News that an operation was underway in Dammartin-en-Goele as authorities tracked "armed and dangerous" fugitive brothers Cherif and Said Kouachi. Shots were reported fired at a building and at least one person was being held hostage. French officials said they are "almost certain" that the suspects in the Charlie Hebdo magazine shooting have been cornered in that building. Read more in NEWS.

2. ‘Pings’ detected in AirAsia jet search

Indonesian officials are hoping for a breakthrough after signals in the Java Sea — possibly from the "black box" data recorders aboard the doomed AirAsia jetliner — have been detected. Those signals could be from so-called pings picked up in the last few days. "It comes and goes," said Tatang Kurniadi, chief of Indonesia's National Committee for Transportation Safety. "There are many possibilities. One is that the pinger has been detached from the black box." So far, bodies of 48 of the 162 people on board have been recovered. Read more in NEWS.

3. Ex-NFL star Aaron Hernandez goes to trial

The convoluted murder trial against Hernandez, a former New England Patriots tight end, starts Friday with jury selection. But the twists and turns of the case, in which the 25-year-old is accused of murdering semi-pro football player Odin Lloyd in 2013, are certain to grab attention. That's because Hernandez is also charged in a drive-by shooting that killed two men outside a Boston nightclub in 2012. Read more in SPORTS.

4. NFL fumbled Ray Rice case, investigator says

The results of an independent probe were released Thursday about whether the NFL properly handled the elevator assault case involving former Baltimore Ravens running back Ray Rice and his then-fiancee Janay Palmer. The report found that there's no evidence that league officials saw or possessed alarming video footage of the elevator assault against Palmer before it was publicly leaked in September. But the NFL's commissioner wasn't completely vindicated, and the probe said the league could have done a more thorough investigation. Read more in SPORTS.

5. Cosby in concert jokes women shouldn't drink around him

This was no laughing matter to some. Comedian Bill Cosby reportedly told a woman in the audience during a Thursday night performance in Canada that she better "be careful about drinking around me." Moments later, a heckler in the audience shouted that the legendary comedian is a "rapist." The 77-year-old beloved TV dad has been dogged in recent months by allegations that he drugged and raped women in past decades. He has never been charged with a crime. Read more in POP CULTURE.

6. Obama proposes free community college program

Community college free for all? That's the proposal coming from the White House, which says the first two years of community college should be made free to anyone "willing to work for it." What that means isn't fully clear, but President Barack Obama is expected to formally announce his plan Friday at Pellissippi State Community College in Knoxville, Tennessee. He gave a preview in a videotaped message shot aboard Air Force One and posted to Facebook. Read more in NEWS.

And now this ...

Think the way you write is so original? A robot claims to have the ability to perfectly copy a human's handwriting.