NPR Staff

In one of this year's most intense international competitions, the United States has come out as best in the world — and this time, we're not talking about soccer.

This week, the top-ranked math students from high schools around the country went head-to-head with competitors from more than 100 countries at the International Mathematical Olympiad in Chiang Mai, Thailand. And, for the first time in more than two decades, they won.

In Northern Ireland, "the Troubles" — the long and bloody conflict between Catholic Irish nationalists and pro-British Protestants — formally came to an end with a peace agreement in 1998.

If you turned on a radio in 1979, there was very good chance you'd hear the music of Rickie Lee Jones. At only 24, she leapt onto the world stage with her big single "Chuck E.'s in Love." Rolling Stone called her "the dutchess of coolsville."

President Obama responded sharply this week when a reporter asked if he was "content" to celebrate the nuclear deal with Iran when at least three and possibly four Americans are being held in Iranian jails.

"Nobody's content," he said, "and our diplomats and our teams are working diligently to try to get them out."

At least one former American hostage thinks the deal is worth signing, despite the remaining hostages.

Seventy years ago, shortly after defeating Nazi Germany, three victorious leaders met in Potsdam, just outside Berlin. President Harry Truman was there with British and Soviet leaders Winston Churchill and Joseph Stalin. Stuart Canin was also there — he was a 19-year-old GI from New York City who played the violin.

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