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KNOW IT ALL: Tuesday's Top Stories at NBC News

Hillary Clinton vows unity while Donald Trump fans the flames after Orlando massacre.
Image: Man draped in rainbow flag embrace ahead of candle light vigil for victims of mass shooting in Orlando, Florida
Men, draped in a rainbow flag, embrace ahead of a candle light vigil in memory of victims one day after a mass shooting at the Pulse gay night club in Orlando, Florida, U.S., June 13, 2016.ADREES LATIF / Reuters

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

1. Clinton Vows Unity While Trump Fans Flames

Do Americans still want to be reassured after a traumatic event, or do they want to be inflamed? Hillary Clinton is staking her presidential candidacy on the former. Clinton's speech after 49 were killed during the attack at a gay club in Orlando, Florida, was an appeal to patriotism and solidarity at time when Trump has used terror attacks to stoke the conservative base's anger against Muslims and politically correct politicians. Read more in NEWS.

2. Donald Trump Would Expand Muslim Immigrant Ban

In a speech reacting to the massacre in Orlando where 50 people were killed, presumptive Republican nominee Donald Trump doubles down on his proposal to ban immigration of Muslims, and he expanded his proposal to "suspend immigration from areas of the world where there is a proven history of terrorism against the United States, Europe or allies." Read the FACT-CHECK.

3. FBI Investigates Whether Orlando Gunman Visited Pulse Before Massacre

The FBI is looking into the possibility that Omar Mateen visited Pulse nightclub and tried to communicate with some of its patrons on a gay dating app before he gunned down 49 people at the club in Orlando, authorities told NBC News on Monday. Read more in NEWS.

4. Dealer Who Sold Massacre Guns: 'I Don't Make the Laws'

The Florida gun dealer who sold a handgun and a rifle to the Orlando massacre suspect said Monday that his conscience is clear. "It's horrible but I don't make the laws. I abide by them," Ed Henson of the St. Lucie Shooting Center, a range and gun shop in Port Saint Lucie, not far from where nightclub shooter Omar Mateen lived. Read more in NEWS.

5. Clinton Eats Away at Trump's Lead Among Men, White Voters

The influence of events of the past week impacting Donald Trump and Hillary Clinton is evident in the most recent NBC News|SurveyMonkey Weekly Election Tracking Poll, which shows Clinton leading Trump by 7 points, 49 percent to 42 percent. The poll was conducted online June 6 through June 12 among 9,355 adults who say they are registered to vote. Read more in POLITICS.

6. Convicted Jihadi Kills 2 Police Officers in Paris Suburb

The knife-wielding assailant who killed two French police officers was a convicted jihadi long known to authorities, a senior police source told NBC News on Tuesday.French officials have called the overnight attack in the Paris suburb of Magnanville an act of terror — carried out in a nation already under a state of emergency due to ongoing threats. Read more in NEWS.

7. Five Teens Wounded in N.Y. Playground Shooting

Police are searching for a gunman who shot and wounded five teenagers at a Brooklyn playground. Police say the male victims, ages 15 to 18, suffered non-life threatening injuries. Read more at NBC NEW YORK.

Nightly Spotlight: Orlando Shooting Victims: A Cancer Survivor, a Singer, a Student

Minute after minute, hour after hour, family and friends waited for word of their loved ones — a cross-section of Americans enjoying a night out at an Orlando nightclub.