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

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

1. ISIS Executioner 'Jihadi John' Targeted in U.S. Airstrike

The notorious ISIS terrorist known as "Jihadi John" was targeted in a U.S. airstrike on Thursday night, the Pentagon said. British citizen Mohammed Emwazi has participated in numerous propaganda videos showing the killings of Westerners. While he was directly "targeted" by the strike in the ISIS stronghold of Raqqa, Syria, a senior U.S. counter-terrorism official told NBC News early Friday that there was "no definitive proof yet that he was killed." Read more in NEWS.

2. ISIS 'On the Run' After Kurdish Forces Enter Key Town

U.S.-backed forces entered the town of Sinjar on Friday after a day of battling ISIS extremists, the Iraqi military said. Sinjar is strategically important because of Highway 47, which lies alongside the town and links ISIS' two biggest strongholds — Raqqa in Syria and Mosul in northern Iraq. Read more in NEWS.

3. Trump Goes Off on Carson's 'Pathological Temper'

The gloves are off. A few hours after claiming that Republican rival Ben Carson has an incurable "pathological temper" and comparing it to something else he says is incurable — "child molesting" — Donald Trump escalated the battle, devoting over 10 minutes of his rally to attacking Carson's personal narrative. Read more in POLITICS.

4. Mormons Leave Church Over Same-Sex Marriage Stance

Hundreds of people are formally renouncing their membership in the Mormon church in protest over a new policy that punishes same-sex couples and their children, an attorney assisting them said. "People are fed up and just don't want their name associated with the church any more," said the Utah lawyer. Read more in NEWS.

5. Aung San Suu Kyi's Party Wins Historic Myanmar Election

Nobel laureate Aung San Suu Kyi's opposition party on Friday secured a historic majority in Myanmar's parliament, making it possible for them to form the Southeast Asian country's first truly civilian government in more than half a century. Read more in NEWS.

6. Tamir Rice Shooting Was 'Reasonable': Consultant

A police consultant report released Thursday by the Cuyahoga County prosecutor found that the officer who fatally shot the 12-year-old Cleveland boy — who had been holding a pellet gun — "was clearly objectively reasonable." Read more in NEWS.

7. Survey Finds Surge in Kids Estimated to Have Autism

A new government survey finds that more than 2 percent of U.S. kids have been diagnosed with autism — or 1 in 45 children aged 3 and older. It's a startling increase from the last estimate of 1 in 68 kids. Read more in HEALTH.

Nightly Spotlight

Army Capt. Florent Groberg rushed a suicide bomber ready to attack his patrol in Afghanistan in 2012, saving more than a dozen lives — now he's a Medal of Honor recipient.

Breaking News Emails

Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings.