Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington. Over the past several years, doctors who performed weight loss surgery noticed an unexpected benefit: Many patients no longer needed to take their medication for their diabetes.

The prosecutor investigating the shooting of Trayvon Martin in Sanford, Fla., has not yet decided if she will bring charges against the shooter, George Zimmerman.

It took several weeks for the Feb. 26 shooting to draw the nation's attention — after Benjamin Crump, the attorney for Trayvon Martin's family, launched a campaign to get the case before media and civil rights activists nationwide.

Two days after the shooting, the high-profile civil rights attorney started getting calls about the case. "My phone was buzzing," Crump says.

A Russian computer security firm says it has discovered that about 600,000 Apple computers have been infected with a "Flashback Trojan" virus.

Now, before we move on, you should know that the company making the announcement is Dr. Web, which sells anti-virus software that will protect a computer against that kind of virus. It's also important to note that many of the parties weighing in are part of a security community that makes money off selling anti-virus software.

Tonight, in Whitesville, W.Va., mourners will silently walk with candles on sidewalks lined with luminary lights to remember the 29 coal miners who died two years ago today in the nation's worst mine disaster in 40 years.

That memorial will follow a 3 p.m. ET event in Beckley,W. Va., where an honor guard will ring a bell 29 times to mark the moment the Upper Big Branch coal mine erupted in a massive explosion.

Race is central to the debate surrounding Trayvon Martin, the black Florida teen shot by neighborhood watch volunteer, George Zimmerman. Many media outlets first identified Zimmerman as "white," but his father describes him as a Spanish-speaking minority. Host Michel Martin explores the question, "who is white?" with sociologist Jean Halley.

Dennis Walcott oversees a school system with more than one million students. Graduation rates are below the national average, and studies suggest most of the city's high school graduates are not ready for college. But Chancellor Walcott tells host Michel Martin that, after one year on the job, New York City schools are on the mend.