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The Libertad, a ship owned by the Argentine Navy, set sail across the Atlantic a few months ago. It was being tracked, via the Internet, by a U.S.-based hedge fund called NML Capital.

Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan, in Washington. The Middle East presents a series of challenges for whomever wins on November 6th: immediate problems in Libya and Syria, a seemingly eternal problem with Israel and the Palestinians, but maybe the biggest problem: the looming crisis with Iran.

When Chicago Tribune columnist Mary Schmich used the word "slacks" in a recent column, a reader commented: "Slacks? How old are you?"

"I was describing a young man, a college guy," Schmich tells NPR's Neal Conan. "I was trying to point out that he wasn't wearing jeans, that he wasn't sloppy, that he wasn't inordinately well-dressed for a guy in college," she says. "And so I used the word 'slacks.' "

Former South Dakota Sen. George McGovern died Sunday at the age of 90. A liberal icon, he made two failed bids for president, but remained active and worked for several organizations battling world hunger. NPR's Ron Elving and Jill Callison of The Argus Leader discuss McGovern's politics and legacy.

The American Psychiatric Association defines a psychiatrist as a medical doctor who conducts psychotherapy and prescribes medications and other medical treatments. With recent developments in the pharmaceutical and insurance industries, the definition of the practice appears to be shifting.

At Monday night's foreign policy debate, the first round of questions for the presidential candidates will involve "America's role in the world."

The answers from President Obama and former Gov. Mitt Romney likely will focus on military readiness and anti-terrorism efforts. That's what most Americans would expect to hear, given that their country has been involved continuously in overseas combat since the terrorist attacks of 2001.

Researchers in South Africa have learned something new about how antibodies fight off HIV in research that could advance the quest to develop a vaccine against the virus.