Talk of the Nation on UPR Too

In his book Concrete Planet, author Robert Courland discusses why the concrete first used by the Romans is more durable than the concrete used in most present day buildings. Plus, mineralogist Peter Stemmerman tells us about his invention, Celitement and why it is greener than Portland cement.

Linguist David Harrison has travelled to remote corners of the world seeking the last speakers of endangered languages. Now, he's using digital tools to to record and revitalize these dying languages. At the AAAS meeting this week, Harrison unveiled 'talking dictionaries' for eight languages.

The number of jobless claims for January 2012 was at the lowest point since March 2008. Businesses are reporting profits, buyers are reporting confidence. Diane Swonk, chief economist for Mesirow Financial, discusses whether it's safe to say an economic recovery has begun.

Since the uprising against President Bashar Assad began in March 2011, international attention has been focused on the marches and demonstrations led by the Syrian opposition. Though it is often cast as a monolith, the Syrian opposition is made up of many subgroups with varied interests.

New York Knicks point guard Jeremy Lin sprang into the spotlight after he scored 27 points in a game against the Toronto Raptors. Lin, who previous mostly rode the bench, has become a sensation in the U.S., particularly among many Asian Americans. Journalist Chuck Leung feels a bit conflicted about celebrating Lin's success.

The Academy of Motion Picture Arts and Sciences has changed the way they nominate documentaries for the Oscars. One of the most controversial changes — proposed by filmmaker Michael Moore — is that films must be reviewed by The New York Times or the Los Angeles Times.

When immigrants face depression, therapy may not be the first option they explore for relief. When they do seek counseling, they often encounter a cross-cultural struggle to understand and be understood by American practitioners.

Israel blames Iran for attacks in the capital cities of India, Georgia and Thailand, further escalating Israeli-Iranian tensions. Washington Post columnist Jackson Diehl believes that Iranian leaders are exhibiting signs of desperation.

GOP presidential candidate Rick Santorum swept caucuses in Minnesota and Colorado and the Missouri primary, gaining considerable ground on Mitt Romney's primary lead. NPR's Ken Rudin and Dan Balz, of the Washington Post, recap the week in politics.

Chinese Vice President Xi Jinping, the heir apparent to the presidency, visited Muscatine, Iowa Wednesday. He spent a week with a family there in 1979 to learn about American agriculture. Des Moines Register reporter Kyle Munson discusses the relationships foreign leaders form with U.S. towns.