Your daily look at late-breaking news, upcoming events and the stories that will be talked about Tuesday:
1. WHY TERROR GROUP CLAIMS IT ATTACKED NAIROBI MALL
Al-Shabab, whose name means "The Youth" in Arabic, said the assault was in retribution for Kenyan forces' 2011 push into neighboring Somalia.
2. WEIGHING RISKS, REWARDS OF HIGH-LEVEL US-IRAN EXCHANGE
If President Obama meets Hasan Rouhani, it would be first top-tier contact between the two nations in more than 30-years.
3. WHO'S BREAKING FROM TEA PARTY CONSERVATIVES
Senate Minority Leader Mitch McConnell says he would not try to block legislation aimed at preventing a government shutdown.
4. ASSAD VOWS TO HONOR CHEMICAL WEAPONS DEAL
But the Syrian leader cautions that rebels might try to block inspectors from reaching some locations.
5. 'I PROMISE YOU, THERE WILL BE HELP'
Vice President Biden tours Colorado flood devastation, says federal aid will flow to the battered state even in the event of a government shutdown.
6. NINE MILLION NEW IPHONES SOLD IN 3 DAYS
The iPhone 5S and 5C's quick start also surpass analyst forecasts that predicted Apple would sell 6 million to 8 million models in the first weekend.
7. WHAT TO EXPECT WHEN YOU'RE EXPECTING
The nation's largest groups of obstetricians and fertility specialists urge OB/GYNs to ask pregnant women about exposure to risky environmental chemicals.
8. SECURITY GETS A CLOSER LOOK AFTER MASS SHOOTING
A week after an IT contractor gunned down 12 workers at the Washington Navy Yard, officials look to close gaps in the security clearance process.
9. FROM THE HORSE'S MOUTH
Conn. state Supreme Court is hearing a case on whether to classify horses as naturally vicious after a boy is bitten at a farm.
10. AT THE CROSSROADS: BATTLE OVER BLUESMAN'S PHOTOS
A Mississippi court considers who should profit from the only two known portraits of legendary guitarist Robert Johnson, who died destitute in 1938.