Mitt Romney releases his first general election campaign ad. Plus wealthy GOP investors say their super PAC won't run a smear campaign connecting controversial pastor Jeremiah Wright with President Obama. Host Michel Martin discusses the latest political developments with Lenny McAllister of Politic365.com and author Michael Fauntroy.

Rodrigo y Gabriela plays everything from heavy metal to jazz to acoustic folk. The duo started out in a thrash-metal band in Mexico City, but moved to Dublin in 1999. From Ireland, its inventive instrumental music spread to the U.K., then to Europe and the U.S. before finally finding its way back to Mexico. Rodrigo y Gabriela's big break came in 2006, when the pair's self-titled debut topped the Irish charts.

Journalists have spent many days and millions of words hashing over the news that banking giant JPMorgan Chase lost billions of dollars trading "synthetic" derivatives.

I am one of those journalists who, more or less, can understand what the bank says it was trying to do, i.e., hedge against loan losses. But here's what I have a hard time explaining:

What does this kind of complex trading have to do with the price of eggs?

American homes are filled with unused prescription drugs. Each year we squirrel away 200 million pounds of pharmaceuticals we don't need anymore, according to some estimates.

Update at 1:17 p.m. ET. Support Afghanistan In 'Different Way':

During their meeting in the White House, President Francois Hollande, the new socialist leader of France, said he told President Obama that he was committed to withdrawing French troops from Afghanistan by the end of the year.

But, the AP reports, Hollande said he was committed to supporting Afghanistan in a "different way."

This was Obama's first meeting with Hollande.

The two leaders also said they wanted Greece to remain a part the European monetary union.

Before President Obama welcomes world leaders to Camp David and Chicago, new French President Francoise Hollande is expected to say he wants his nation's 3,300 troops home from Afghanistan by year's end. That could upset other NATO nations.

Among the key things to know about what's in the hundreds of pages of evidence and other materials related to the Feb. 26 shooting death of Florida teenager Trayvon Martin, which were released Thursday:

Facebook's much-publicized first sale of stock to the public started with a bang late this morning as the price per share jumped. But though the volume of shares sold was a record for an initial public offering, the stock's price gave up its gains as the day continued.

By the end of trading in the U.S., Facebook had settled right at the $38 initial offering price that had been set before shares went on sale.