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DAVID GREENE, HOST:

This is MORNING EDITION from NPR News. I'm David Greene.

STEVE INSKEEP, HOST:

And I'm Steve Inskeep.

Transcript

DAVID GREENE, HOST:

It's MORNING EDITION from NPR News. Good morning, I'm David Greene.

STEVE INSKEEP, HOST:

And I'm Steve Inskeep.

Next week, Mitt Romney's campaign seeks to introduce Paul Ryan again. Even before the selection of the Republican vice presidential choice, President Obama's campaign had been working to define Ryan as extreme on issues from Medicare to abortion. What happens next week is that Romney and Ryan take the stage at the Republican National Convention, one of several things that will happen there.

Six years ago, we told you about a woman, identified as A.J., who could remember the details of nearly every day of her life. At the time, researchers thought she was unique. But since then, a handful of such individuals have been identified. And now, researchers are trying to understand how their extraordinary memories work.

Ever wonder how charitable the people are who live in your state or community? It turns out that lower-income people tend to donate a much bigger share of their discretionary incomes than wealthier people do. And rich people are more generous when they live among those who aren't so rich.

Roxana Castro sits in an orange chair in the waiting room at Mary's Center in Washington, D.C. She's 17, and expecting a baby boy next month. The pregnancy was a surprise, she says, mostly for her parents, but also for the baby's father.

Even with her mother's help, Castro admits she's nervous. The father of the baby says he'll be there, but she knows this is a big responsibility, and says she's not ready to start a family just yet.

"A baby is so fragile," she says. "I don't know how to take care of it or anything."

Weekends on All Things Considered continues its "Why Music Matters" series with a story from the operating room.

"The O.R. is a naturally rhythmic place, in that you have the beating of the anesthesia machines and the autoclave comes on," says Divya Singh, an orthopedic and hand surgeon. "So music just becomes another sound."

The recent outbreak of West Nile virus in the Dallas area has led to a new round of large-scale spraying for mosquitoes — a method of treating outbreaks that has generations of success, and even nostalgia, behind it.

Although the overall mosquito-killing strategy has changed little since the days when it was pioneered during construction of the Panama Canal a century ago, the chemicals used have become much safer for everything and everyone involved, save the mosquitoes, experts say.