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

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Good morning. Here are some of the headlines we're following this morning:

1. Key Questions Remain in Orlando Massacre

More than two days have passed since Omar Mateen gunned down dozens of people inside the Pulse nightclub in Orlando, a three-hour siege that left 49 innocent people dead, along with the gunman. But so much remains unclear. Read more in NEWS.

2. Gunman’s Wife Tried to Talk Him Out of Attack

In addition, Mateen's wife, Noor Zahi Salman, told the FBI she was with him when he bought ammunition and a holster, several officials familiar with the case said. She told the FBI that she once drove him to the gay nightclub, Pulse, because he wanted to scope it out. Read more in INVESTIGATIONS.

3. Why Death Is Easier Than Coming Out for Gay Muslims

Afghan-Americans are grappling with shock, shame and the taboo topics of homophobia and religious intolerance in their community in the wake of Mateen's massacre of dozens at a gay nightclub. Read more at NBC OUT.

4. All Forgiven? Clinton, Sanders Agree to Work Together

The Democratic Party establishment's long, awkward and occasionally frightening nightmare is over — or at least just about. Hillary Clinton was declared the winner of the final primary in the party's presidential nominating process Tuesday night, just as she sat down for a highly anticipated summit with rival Bernie Sanders. Read more in POLITICS.

5. Boy, 2, Dragged Into Water by Alligator Near Disney

The boy was on vacation with his family at a Disney resort in Florida when he was attacked by an alligator and dragged into a lake in front of his horrified parents, police said. Read more in NEWS.

6. Stanford Rape Case Judge Pulled From Sex Assault Trial

Judge Aaron Persky, who handed down a controversial sentence in a sexual-assault case involving a former Stanford student, was removed from a new case at the request of prosecutors in Santa Clara County, California. Read more in NEWS.

7. Death Toll Climbs to 5 in Los Angeles Fire

A man accused of intentionally lighting a building on fire where five people were found dead was arrested on suspicion of murder Tuesday, the LAPD said. Read more at NBC LOS ANGELES.

Nightly Spotlight

Dr. Joshua Corsa, a surgeon at Orlando Regional Medical Center, posted a moving photo of his blood-stained shoes on Facebook, saying, "This blood...will stain me forever."