Fresh Air Weekend highlights some of the best interviews and reviews from past weeks, and new program elements specially paced for weekends. Our weekend show emphasizes interviews with writers, filmmakers, actors and musicians, and often includes excerpts from live in-studio concerts. This week:

We continue to follow the tragic news from Newtown, Conn., about Friday's mass shooting at an elementary school.

There is, of course, other news:

-- "Some Polling Issues As Egyptians Vote On Draft Constitution." (NPR's Soraya Sarhaddi Nelson)

President Obama focuses on the mass shooting in Newtown, Conn., in his weekly radio/Web address. His message echoes the emotional comments he made to the nation Friday afternoon.

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SCOTT SIMON, HOST:

The Sandy Hook Elementary School joins a sad and lengthening list of names in recent U.S. history. Since 12 students and a teacher were killed at Colorado's Columbine High School in 1999, there have been scores of other school shootings - so many it may be hard to recall all the names: Red Lake, Nickel Mines, Virginia Tech and Chardon High School are just a few of the names that have become branded by tragedy. Ben Markus of Colorado Public Radio spoke with Frank DeAngelis, the principal of Columbine High School.

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SCOTT SIMON, HOST:

NPR justice correspondent Carrie Johnson joins us in the studio for more on the investigation. Carrie, thanks for being with us.

CARRIE JOHNSON, BYLINE: Thank you, Scott.

SIMON: What do we know about the shooter, and is anything developing on what I noticed Lieutenant Vance carefully called - he didn't use the word motive, he said the how and the why of the shooting?

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SCOTT SIMON, HOST:

And this morning, of course, we are reporting the story from Newtown, Connecticut, where yesterday a young man named Adam Lanza shot and killed some 26 people at an elementary school - 20 of them small children. Connecticut state police have briefed residents of Newtown and reporters on the latest from the crime scene at the Sandy Hook Elementary School, and at second crime scene.

In the gymnasium of a South London technical school, site of this year's World Memory Championships, Norwegian Ola Kaere Risa checks his stopwatch.

Risa is Norway's only contestant this year.

"I hope to defend the glory of my country," he says, laughing.

The 21st World Memory Championships are under way in London this weekend. About 75 competitors from some two dozen countries are vying to see who can memorize the most numbers, faces, playing cards or random words in a set amount of time.