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KNOW IT ALL: Monday's Top 7 Stories at NBC News

From the death of Bobbi Kristina Brown to the latest on the campaign trail, see the stories we're following today.

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

1. 'Finally at Peace': Bobbi Kristina Brown Dies at 22

The only daughter of singers Whitney Houston and Bobby Brown died Sunday, nearly six months after she was found unresponsive in a bathtub of her home, her family said. Read more in POP CULTURE.

2. Rescuers 'Concerned' After Finding Boat but Not Teens

An overturned boat was found Sunday belonging to two teenage boys who disappeared while fishing off the Florida coast two days earlier, according to the U.S. Coast Guard. Read more in NEWS.

3. Polls Show Trump Running Strong in New Hampshire, Iowa

Trump leads the Republican presidential field in New Hampshire, getting support from 21 percent of potential GOP primary voters. In Iowa, Scott Walker and Trump are in the top two — with Walker at 19 percent among potential Republican caucus-goers and Trump at 17 percent. Read more at MEET THE PRESS.

4. 21 Dead After Shooting at Afghanistan Wedding

The shooters were guests at the event and believed to be members of illegal local militias, rather than militant groups such as the Taliban or al Qaeda, provincial chief Gen. Abdul Jabar Purdeli said. Read more in NEWS.

5. Oregon Man Shot Dead by Sex Worker Could Be Serial Killer

Police believe a man killed last week by a West Virginia sex worker could be linked to the disappearances or deaths of four prostitutes in the Las Vegas area a decade ago — and maybe a half-dozen more women in Chillicothe, Ohio. Read more in NEWS.

6. America's Youngest Convicted Killers Are Being Released

In 1999, Curtis and Catherine Jones were siblings in middle school when they gained notoriety as confessed killers. But on Tuesday, after 16 years behind bars, they will both soon be free. Read more in NEWS.

7. Milwaukee Police Have Seen Lion-Like Animal — Twice

The suspected king of the jungle was first spotted last Monday, and a cellphone video showing a blurry image spooked Milwaukeeans. Since then, dozens of people have called police to report sightings. Read more in NEWS.