From NPR News

Melissa Block talks to Zouheir Jabbour, Chief of Mission of the Syrian Embassy in Washington, DC, about the call for a ceasefire in Homs and the allegations of atrocities by the Syrian regime.

A new report by the United Nations' nuclear agency claims that Iran has ramped up production of a purer form of enriched uranium over the past few months. The report by the International Atomic Energy Agency was obtained by The Associated Press and other news outlets and it's likely to further suspicions from Western countries that Iran might be working on a nuclear weapon.

The Obama administration is seeking to try a Lebanese man linked to Hezbollah in a military commission, expanding the reach of the military tribunal beyond al-Qaida and Taliban suspects for the first time.

The man at the center of the case is Ali Musa Daqduq. He was the last detainee held by American forces in Iraq and had been turned over to Iraqi custody when U.S. forces formally withdrew from Iraq in December.

The International Committee of the Red Cross said today that its crews had reached the restive city of Homs in Syria and they have begun evacuating some of those injured by the shelling.

The Telegraph reports that the Red Cross said two wounded Western journalists were were evacuated, as well as the body of two others. The Telegraph adds:

Filmmaker Woody Allen is notorious for not attending the Oscars each year, despite his numerous nominations.

Representatives from some 70 countries met in Tunis on Friday and issued an ultimatum to Syria's President Bashar al-Assad, demanding an immediate ceasefire and humanitarian access to cities like Homs that have been under bombardment by the Syrian army. Audie Cornish talks to Michele Kelemen about the news.

The Martin Luther King Jr. memorial isn't the only monument in Washington, DC, that has grappled with how to make a correction. At the Vietnam Veterans Memorial, there are more than 58,000 names inscribed on the wall. More than 100 of them have been misspelled, but 62 have been fixed. Memorial fund president Jan Scruggs explains how they've made the corrections.

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AUDIE CORNISH, HOST:

Another legal question: What do a urine test and FedEx have in common? Well, today at least, they both relate to one of Major League Baseball's best players, Ryan Braun of the Milwaukee Brewers, the National League MVP. Yesterday, an arbitrator overturned his 50-game suspension for violating the league's rules on performance-enhancing drugs. And today, Braun showed up for spring training in Phoenix and defended himself to the media.

In Syria, medics working with the International Committee of the Red Cross (ICRC) and the Syrian Arab Red Crescent are evacuating the injured from a neighborhood of Homs. The area known as Baba Amr has been under a long and heavy bombardment from Syrian government forces. Melissa Block talks with Saleh Dabbakeh, a spokesman for the ICRC who is in Damascus.

We've all seen those bathtub refinishing ads that promise a glossy new surface on the dingy old tub.

But a solvent used to make that transformation has killed at least 13 people who used it to strip bathtubs from 2006 to 2011, according to a new study. The chemical, methylene chloride, is sold as a solvent and paint stripper both to professionals and in dozens of do-it-yourself products sold at home improvement stores.

The standard picture of the moon is of a long-dead object, geologically speaking. But using observations from cameras on board the Lunar Reconnaissance Orbiter, Thomas Watters and colleagues say in the journal Nature Geosciencesthat there are signs of more recent tectonic activity on the moon, within the last 50 million years.

Photographer and videographer Edward Aites, of Seattle, submitted this time-lapse video to Science Friday. He looked at ice through a macro lens and cross-polarizing filters, and found a colorful, surprising landscape. This is ice like you've never seen it before.

Flu season usually peaks around February. But this year it's missing in action, with the CDC reporting the slowest start to the flu season on record. Peter Palese, a microbiologist at Mount Sinai Medical Center, discusses whether unseasonably warm winter weather may be to thank.

Computer chip makers have long struggled to build ever-smaller transistors to allow faster, more powerful computers. Writing in the journal Nature Nanotechnology, a team of scientists describes what may be the ultimate limit of that struggle — a transistor made of a single atom. Michelle Simmons, a physicist at the University of New South Wales in Australia and leader of the project, discusses the work.

Bloomberg News reporter John Lauerman volunteered to have his DNA sequenced by Harvard researchers to demystify the process for the public. What he didn't expect to uncover was that he possessed two gene variants--one linked to rare blood disorders and the other to a higher risk of Alzheimer's.

Reporting in Environmental Science and Technology, researchers write of harvesting electricity from microbe-rich river sediments--enough to power a small LED bulb. Grant Burgess, a marine biotechnologist at Newcastle University, discusses the hunt for electron-burping bugs.

When doctors autopsied tuberculosis patients, they described finding round, white swellings, especially in and around the lungs. Medical historian Howard Markel describes how those potato-like growths led to the disease being called tuberculosis, from the Latin tuber.

Web browser manufactures often market their products to consumers with an emphasis on privacy, assuring users that their products can better control how personal information is used online. Carnegie Mellon privacy researcher Lorrie Cranor explains that many companies have developed quiet ways to step around some of that privacy-protecting code.