Talk of the Nation

After the terrorist attacks on 9/11, some law enforcement agencies adapted crime mapping tactics into what is known as ethnic mapping. Some Muslims welcome ethnic mapping as a useful approach to preventing terrorism. Others say the surveillance amounts to domestic spying and racial profiling.

Kony 2012 is not your usual viral video. A thirty-minute film by the nonprofit group Invisible Children, it hopes to raise support for the arrest of Joseph Kony, the leader of the Lord's Resistance Army. Freelance reporter Michael Wilkerson fact checks the film and explains the controversy.

The divorce rate among people 50 and older has doubled in the past 20 years, according to research by Bowling Green State University sociologists Susan Brown and I-Fen Lin. Their paper, "The Gray Divorce Revolution," examines the factors driving the trend.

Most people are familiar with Leonardo Da Vinci's Vitruvian Man: A nude man, with his arms and legs stretched, inside a square within a circle.

Toby Lester tells the story behind the drawing and Da Vinci's zeal to create an image of the perfectly proportioned human in Da Vinci's Ghost: Genius, Obsession, and How Leonardo Created the World in His Own Image.

Overcrowded prisons already coping with budget pressures face a new challenge: The growing needs of an aging inmate population. With limited state budgets, prison setups, and facilities, prison officials are trying new ways to provide care and, in some cases, opting to release inmates early.

The viruses, spam and malware that have plagued desktop computers for years now increasingly threaten mobile smartphones, as well. More text messages now deliver scams and a growing number of malicious apps install spyware, target personal information and attempt to charge users hidden fees.

Mitt Romney eked out a victory in Ohio's Super Tuesday primary. It was the closest of ten races, and the most closely watched. Rick Santorum came in second. Newt Gingrich took his home state of Georgia, Romney won six in all, and Santorum kept his campaign alive by winning three.

Talk of the Nation listeners wrote to the show to share their insights on previous show topics, including genetic testing, affirmative action, the source and practice of patience, and interracial marriage.

Syndicated radio host Rush Limbaugh called a Georgetown student a "prostitute" and a "slut" after she testified before a Senate committee and called for federal health care coverage to include the cost of contraception. Limbaugh apologized, but it has prompted a re-examination of the term, "slut."

President Obama recently said, "Iran's leaders should understand that I do not have a policy of containment; I have a policy to prevent Iran from obtaining a nuclear weapon." Some say containment represents a viable option against Iran, but others argue that Cold War strategies do not apply to Iran.