10 Things to Know for Tuesday

Your daily look at late-breaking news, upcoming events and the stories that will be talked about Tuesday:

1. GOP SENATORS ISSUE PUBLIC WARNING TO TEHRAN ON NUCLEAR DEAL

The lawmakers' unusual open letter cautions that any agreement Obama reaches with Iran could expire the day he leaves office.

2. UNIVERSITY OF OKLAHOMA SEVERS TIES WITH FRAT OVER RACIST VIDEO

The video shows several Sigma Alpha Epsilon members participating in a chant that includes a racial slur and references lynching.

3. SHAKEUP IN FERGUSON'S JUDICIAL SYSTEM

A Missouri appeals court judge is appointed to take over following a federal report chiding what was described as a profit-driven city court system.

It's the latest of a number of recent crashes at railroad crossings in the U.S.

5. CONVENIENCE, IMMEDIACY SELLING POINTS OF APPLE'S SMARTWATCH

As Apple unveils its new wearable gadget, one expert says: "If you don't have to be fumbling around for your phone, that can make a difference."

6. WHERE GUN OWNERSHIP IS DECLINING

Only 32 percent of Americans own a firearm themselves or live with someone who does — which ties a record low set in 2010, a survey shows.

In some countries, naloxone costs as little as $1 a dose. In the U.S., the potentially life-saving drug now can cost hundreds of dollars a dose.

8. WHY SANITATION WORKERS IN JORDAN'S CAPITAL AREN'T WEARING ORANGE

The workers' old uniforms were too reminiscent of the outfits worn by Islamic State captives in grisly beheading videos.

9. CO-CREATOR OF 'THE SIMPSONS' DIES AT 59

Sam Simon, who had cancer, left the TV show after its fourth season, then channeled much of his personal fortune into social causes.