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

From the dashcam video of Sandra Bland's arrest to the investigation into the Chattanooga shooter, see the stories we're following today.

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

1. Was the Sandra Bland Traffic Stop Video Edited?

Texas Department of Public Safety authorities said late Tuesday they were looking into alleged edits to a 52-minute dashcam video of the traffic stop and arrest of Sandra Bland, who died in a jail cell three days after her arrest. Police say Bland committed suicide — but her death has raised the suspicions of her family and supporters. Read more in NEWS.

2. Tenn. Shooter Downloaded Radical Recordings: Officials

Mohammad Youssef Abdulazeez, the gunman who allegedly killed four Marines and a Navy sailor last week in Tennessee, had downloaded audio recordings of Anwar al-Awlaki, the American-Yemeni cleric who was a recruiter for al Qaeda, law enforcement officials told NBC News. A law enforcement official also said Abdulazeez's uncle in Jordan is believed to be "radical" and officials are investigating whether he influenced Abdulazeez when he was living there. Read more in NEWS.

3. Aurora Gunman Won’t Testify During Sentencing Phase

James Holmes won't speak on his own behalf when the same jury that convicted him in the Colorado theater massacre reconvenes Wednesday to begin deciding whether he should live or die. A jury last week convicted Holmes on 165 counts of murder, attempted murder and other charges in the July 20, 2012, attack, rejecting his insanity defense. Read more in NEWS.

4. Teens Turning More Often to Morning-After Pill

More than 1 in 5 sexually active teen girls in the U.S. have used the morning-after pill — a dramatic increase that likely reflects that it's easier these days for teens to buy the emergency contraceptive. A report released Wednesday shows teen use of the pill rose steadily from a decade earlier, when it was 1 in 12. Read more in HEALTH.

5. How the Media Are Fueling Donald Trump’s Campaign

The GOP presidential candidate has had no trouble getting news coverage thanks to his controversial remarks on issues and even his fellow Republicans. In fact, from June 14 to July 12, Trump received more coverage than the combined total of Jeb Bush, Scott Walker and Marco Rubio — generally considered the three leading GOP candidates, according to Google. Read more in POLITICS.

6. Protests After Man Shot in Head by Ohio Police

Prosecutors are reviewing the fatal shooting of Samuel Dubose, 43, by a University of Cincinnati police officer who had pulled him over for having a missing front license plate, authorities said Tuesday. Friends and relatives held a vigil Tuesday demanding to see the body cam video and seeking answers to why Dubose, who was apparently unarmed, had been shot. Read more in NEWS.

7. Obama Has Final Farewell With Jon Stewart

President Barack Obama appeared on "The Daily Show" Tuesday night for his last time as commander in chief, touting his record in the White House and saying there's still "a bunch of other things we want to get done" before his term ends. He also chided Stewart for retiring from the show before he ends his time in office: "In fact, I'm issuing a new executive order that Jon Stewart cannot leave the show." Read more in POP CULTURE.

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