The London Olympics are still more than a month away, but fans of swimming were eager to see the 2012 edition of the rivalry between Michael Phelps and Ryan Lochte get started Monday, when the two Olympic gold medalists face off in the final of the 400-meter individual medley at the U.S. Olympic Trials.

Update at 8:32 p.m. Lochte Beats Phelps

Lochte defeated Phelps at the U.S. Olympic swimming trials.

Here's more from The Associated Press:

A Greek city's new subway project has led to the discovery of an ancient road made of marble that was laid nearly 2,000 years ago. The road in Thessaloniki is made of paving stones that show signs of use by both horse-drawn carriages and local children, the AP reports.

Facebook now has a woman on its board of directors: The company announced Monday that Chief Operating Officer Sheryl Sandberg would join the board.

Sandberg, the company's No.2 executive, was hired away from Google in 2008.

Kaiser Permanente rose out of Henry J. Kaiser's utopian, industrialist dream.

It's hard to pick a favorite Tiny Desk Concert from the hundreds we've done, but this could be the one. For me, music is best when it surprises, takes chances and makes me smile. Comedian and musician Reggie Watts performed three "songs" at the NPR Music offices, all of them spontaneous improvisations and all of them playful, even magical.

Watts came with a simple setup of loop pedals, delay pedals and a microphone. He laid down the beats and bass, entirely with his voice, and built up layers of sound, melody and rhythm — more like a magician than a musician.

California has long been a trendsetter. But when it comes to reducing smoking and lung cancer, the Golden State's success hasn't taken the entire nation by storm.

Just take a look at the chart, which shows lung cancer death rates among white women by the year they were born.

For those women born since 1933, lung cancer death rates in California have dropped by more than half. In Alabama, they've more than doubled.

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AUDIE CORNISH, HOST:

To the Supreme Court now and a much-anticipated decision on Arizona's controversial immigration law. The justices struck down most of SB1070, as the law is known. But the court did unanimously allow one key provision to take effect, and that's giving both sides reason to claim victory. We'll delve more deeply into the ruling with Nina Totenberg elsewhere in the program, but now to reaction from Arizona and NPR's Ted Robbins.

And Ted, let's start first with the three provisions of this law that were blocked. What were they?

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Neither President Obama, nor his Republican rival Mitt Romney spoke on mic about the high court's immigration ruling today, despite the high profile role immigration has played in the presidential election this year. Both presidential campaigns are heavily courting the Latino vote, but today, they offered up only written statements. President Obama's offered a mixed review. He said he was generally pleased, but expressed concern about the Show Me Your Papers provision.

The opening ceremony of the London 2012 Summer Olympics are just over a month away — leading NPR and other media to cover the intense preparations for the games. That also means the Paralympic Games are on the way, as athletes with physical disabilities round into top form for the Aug. 29 opening day.