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

A look at the key headlines.
Image: Today in Pictures
A woman cheers after receiving tickets to Muhammad Ali's memorial service at the KFC Yum! Center in Louisville, Ky. Ali's memorial service Friday looms as one of the most historic events in Louisville's history.David Goldman / AP

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

1. Who Could Clinton Choose as Her Vice President?

Every four years, summer brings with it a popular parlor-game among even the most casual political observers. Who will the presidential nominee(s) pick as their running mate? Here's a look at the candidates Hillary Clinton could pick to be her second-in-command. Read more in POLITICS.

2. Trump’s Potential VP Picks Could Help Policy-Making

Donald Trump has said he's seeking a governing partner who understands the ins and outs of policy-making. Here's a look at some of the top contenders for the job. Read more in POLITICS.

3. Israel Sends 2 Battalions to West Bank After Attack

Two Israeli battalions were being sent to the West Bank Thursday after two Palestinians fatally shot four people at a Tel Aviv mall on Wednesday. Read more in NEWS.

4. California Ponders Life and Death Under ‘Right to Die’ Law

Terminally ill California residents may now legally take medicine to end their lives because of a new law that goes into effect Thursday. Read more in NEWS.

5. OpEd: Muhammad Ali Stood for Principle, Despite Costs

They were gone in an hour. All 15,000 tickets to Friday's public memorial service for Muhammad Ali in his hometown of Louisville, Kentucky, were gone that quickly. But while the late Ali earned global acclaim and respect for his stands, he paid a high price in life. Read more in NBC BLK.

6. Aaron Hernandez Hires Casey Anthony’s Former Lawyer

For his upcoming murder trial, convicted killer and former NFL player has hired the attorney who represented Anthony, who was found not guilty of the brutal 2008 murder of her 2-year-old daughter. Read more at NEW ENGLAND CABLE NEWS.

7. Texas Valedictorian Under Fire for ‘Undocumented’ Tweet

Mayte Lara Ibarra of Austin has stirred controversy after she tweeted that she will be attending the University of Texas-Austin with a full scholarship and that she is undocumented. Read more in LATINO.

Nightly Spotlight

Niagara Falls, one of the great natural wonders of the world, is shared by the United States and Canada leaving Peter Kowalski responsible for who gets how much water.