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

A look at the key headlines.

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

1. RNC Rules: Insiders Speak Out on Contested Convention

If no presidential candidate wins a majority of delegates and Republicans face a contested convention this summer, a small group of party insiders will have huge sway over who wins — and how to resolve a rift that could fracture the Republican Party. Read more in POLITICS.

2. ‘Leaked’ Trump Info Has Been Online for a While

Self-identified members of the loosely organized hacktivist group Anonymous posted what they claimed to be cellphone and Social Security numbers for GOP front-runner Donald Trump on Thursday — but the information appears to have been floating around online for a while. Read more in TECH.

3. ‘Bad Decision’: U.S. Man Talks About Time With ISIS

An American-born son of Palestinian immigrants in Virginia — described as an ISIS defector — says he made a "bad decision" to follow a young woman to Iraq and claims he left the terror organization because he doesn't share its views. Read more in NEWS.

4. Northeast Could Get Foot of Snow to Start Spring

Forecasters said Thursday it's still too early to know for sure, but yet another polar vortex is looking more likely to leave significant accumulations Sunday and Monday from Philadelphia to Boston. Read more in NEWS.

5. N. Korea Launches Ballistic Missile in New Provocation

Defying the United Nations, North Korea on Friday launched one and possibly two ballistic missiles, South Korean military officials said. U.S. State Department spokesman John Kirby said the U.S. is aware of the reports of the missile launch and is monitoring the situation. Read more in NEWS.

6. Syria Is 'Better Than This Place': Refugee Mom

A refugee mom says her children are begging to return to war-torn Syria rather than endure conditions in a squalid camp on Europe's southeastern border. Read more in NEWS.

7. First Day of NCAA Tournament Full of Stars, Struggles

In a tournament that was projected to lack depth at the mid-major level, the first day of play Thursday flipped the script and provided plenty of madness. Read more at NBC SPORTS.

Nightly Spotlight

Presumed dead after being lost at sea five weeks ago, a German shepherd puppy named Luna has shown she has some serious survival skills.