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For the first time in 20 years, a woman — CNN's Candy Crowley — will moderate a presidential debate, the Commission on Presidential Debates announced Monday.

The moderators for all three presidential debates and the sole vice-presidential debate were announced:

House Republicans have gone through with their promise: The House Oversight and Government Reform Committee has filed a lawsuit against Attorney General Eric Holder, claiming that he is under contempt for failing to turn over documents related to the failed gun-walking operation Fast and Furious.

Fox News reports they filed the civil case today. Fox adds:

"That decision is expected to be challenged in the court case.

The bombing that began the July 22, 2011, attacks in Oslo could have been prevented and the massacre that followed on an island outside the city could have been stopped much sooner than it was, according to a report released today by an independent commission.

Many conservatives were ecstatic with Mitt Romney's choice of Wisconsin Rep. Paul Ryan as his running mate. Even though few observers expect the ticket to draw much African-American support, conservative Lenny McAllister says black voters should give the team a chance. Guest host Jacki Lyden talks with McAllister and the NAACP's Hilary Shelton.

More Americans are segregated by income today, than they were 30 years ago. That's according to a new Pew Research Center study looking at U.S. neighborhoods. Rice University sociologist Stephen Klineberg says income segregation is a direct result of a shrinking middle class. He speaks with guest host Jacki Lyden about these changes.

The Olympics are over, but guest host Jacki Lyden takes a look at the lasting impact of the Games on young people living in the neighborhoods around Olympic Park. She speaks with East London residents Amber Charles and Rumi Begum. Both young adults participated in the Olympic torch relay in recognition of their contributions to sports in the area.

A federal investigation into two researchers who wrote a famous report on drowned polar bears is finally over, according to their lawyer.

But the scientists still haven't been allowed to see a copy of the investigation report or its conclusions, says attorney Jeff Ruch of Public Employees for Environmental Responsibility.

Critics have charged that the two-year investigation was a witch hunt into researchers whose work had political implications.

Good morning.

Our early headlines:

-- It's Deja Vu All Over Again: Campaign's Focus Returns To Iowa.

-- In Egypt, Talk Of Coups And Counter-Coups.

Here's the above-the-fold headline on Sunday's Miami Herald: "Ryan could hurt Romney in Florida."

Sunday's sacking (or forced retirements, if you prefer) of Egypt's military chiefs by new President Mohammed Morsi has analysts scrambling to explain what it all means.

Google is eliminating about 20 percent of the jobs at Motorola Mobility, the struggling cellphone manufacturer it finished acquiring earlier this year for $12.5 billion, according to reports from The New York Times, Dow Jones' All Things Digital blog and other news outlets.

Good morning.

With Republican presidential candidate Mitt Romney's vice presidential pick now in the books (if you somehow escaped the news from the weekend, it's Rep. Paul Ryan of Wisconsin), the presidential campaign shifts into a higher gear this week.

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This summer, I was one of nearly 200 cyclists who toured D.C. one night in search of the city's most colorful murals in parking lots and back alleys.

The tour was co-sponsored by MuralsDC, a citywide project that trains young artists to paint mural masterpieces over tired, tawdry graffiti.

"It makes art so personal and accessible at once," says Laura Lyons, 20, a summer volunteer.

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NPR's business news starts with a spike in gas prices.

Gasoline prices jumped 18 cents over the last couple of weeks. That's the biggest increase so far this year. The Lundberg Survey shows that heading into the weekend, the national average price of a gallon of self-serve was $3.69. Now, analysts say the spike is in part because of some refinery and pipeline issues around the country.

Researchers used economic principles to predict which countries would win the most medals at the London Olympic Games. The study was 95 percent accurate for the 2008 games. And this time around, it was 97.7 percent accurate.

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For more on this big weekend in politics, we turn to Cokie Roberts for some analysis. Good morning.

COKIE ROBERTS, BYLINE: Hi, Renee.

MONTAGNE: So we just heard in Ari's piece the excitement Paul Ryan is generating among the Republican faithful. Is that partly why Mitt Romney chose him as his running mate, to generate some of the kind of enthusiasm that has been missing from his own campaign?

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DAVID GREENE, HOST:

Over the weekend, GOP presidential hopeful Mitt Romney named Wisconsin Rep. Paul Ryan as his running mate. David Greene talks to Ryan Lizza, a reporter for The New Yorker, who recently profiled Ryan for the magazine.

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Egypt's first freely elected president made history there Sunday by confronting the military power structure. Mohammed Morsi forced top military leaders into retirement and shifted the balance of power to the civilian government. Analysts called it the boldest and most unexpected move of Morsi's fledgling presidency. NPR's Leila Fadel has the story from Cairo.

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The addition of Rep. Paul Ryan to the GOP ticket is certain to elevate health care as a campaign issue this fall.

When it comes to a healthy diet — especially for women, and especially after menopause — nutritionists, doctors, everybody it seems, will tell you: calcium, calcium, calcium.

Federal health officials recommend that women and men younger than 50 consume 1,000 milligrams of calcium per day. The recommendation goes up to 1,200 milligrams after age 70 for men and after menopause for women, when a major drop in estrogen causes bone loss.

One factor that has kept Poland somewhat insulated from the eurozone crisis is domestic consumer spending. Poland had more than 4 percent growth last year while the rest of the continent was mired in negative or flat growth. Poles have more discretionary income than ever before, and they're using it to buy things in swank malls cropping up all over the country.

Many of us experience heartburn, or reflux, from time to time — and when we do, we're quick to point the finger at heavy, fatty meals. But that burning, uncomfortable feeling may also be the result of what we're drinking: namely, coffee and other caffeinated beverages, and alcohol.

"Alcohol has a direct effect" on heartburn, says Kevin Ghassemi, a gastroenterologist at the University of California, Los Angeles. "Temporarily, of course."