People with extremely rare diseases are often scattered across the world, and any one hospital has a hard time locating enough individuals to conduct meaningful research.

But one woman with an extremely rare heart condition managed to do what many hospitals couldn't. Katherine Leon connected with enough people online to interest the Mayo Clinic in a research trial.

In the world of high-dollar politics, the billionaire industrialists David and Charles Koch are famous for their lavish funding of conservative politicians and causes. But there's another Koch brother — William — who is passionate about many things, but only recently about politics.

Bill Koch is an avid yachtsman, and he set out to win the 1992 America's Cup. It would take four boats, more than 260 team members and single-minded determination.

David Rosow was the team's business manager and is a longtime friend of Koch's.

The unlikely bond between a nurse and one of her many patients began at the Vietnam Veterans Memorial. Ann Remington was with her brother, Army pilot Scott Saboe, when he got a POW/MIA bracelet — on it, the name of an Army airman who went missing in action in Vietnam. Scott died a few months later when his helicopter was shot down in Iraq. Ann found the bracelet in his things and kept it. Years later, the nurse was interviewing a new patient, World War II veteran Ted Soyland, and the name sounded familiar.

Vatican authorities have charged Pope Benedict XVI's butler with illegally possessing secret documents. His arrest is the latest embarrassment for the Vatican. David Greene talks to NPR's Sylvia Poggioli for the latest on the investigation.

The Syrian government is denying allegations that its military killed more than 100 people, nearly half of them children, in the village of Houla. On Monday, the United Nations' special envoy to Syria, Kofi Annan, was in Damascus to pressure the Syrian government to abide by a cease-fire that most agree has been a failure. For the latest developments, NPR's Kelly McEvers talks with David Greene.

Transcript

GUY RAZ, HOST:

Every few weeks on the program, we've been running an occasional series called Why Music Matters, where we bring you the stories of music fans in their own words, about how certain songs or even bands have changed their lives. Today's story comes from a young artist in Seattle. Her name is Vivi Perez, and she almost gave up on high school, that is until a community activist group called El Centro de la Raza introduced her to the music business.

VIVI PEREZ: I felt kind of, like, I didn't know where I was going a lot in high school.

Transcript

GUY RAZ, HOST:

Let's turn to another story we've been following in recent weeks: African-Americans and same-sex marriage. When President Obama came out in support of gay marriage, some African-American religious leaders protested. But according to new polling data, African-Americans are no less supportive or, for that matter, opposed to gay marriage than any other group in the country.

The U.N. Security Council is condemning the Syrian government for the massacre of scores of people, including children, in the town of Houla, a day after images of the mass killings shocked the world.

In this space earlier this month, I wrote about whether President Obama would face a backlash from African-Americans for his endorsement of same-sex marriage. (He hasn't.) I made mention of a random field experiment in which 285 black people in Cook County, Ill., were polled about gay marriage.

The Associated Press recently reported on the growing numbers of veterans filing new disability claims after returning from war. Close to one out of two veterans who've served in Iraq or Afghanistan have now filed disability claims for service-related injuries — more than double the rate of previous wars. Marilynn Marchione of the AP offers her insight.