This is SCIENCE FRIDAY. I'm Ira Flatow. When you think about Albert Einstein, the words E=MC squared and Theory of Relativity naturally come to mind. But Einstein did not win his Nobel Prize for that work. Instead, he won the prize for figuring out how light interacts with objects and for believing, when almost no one else did, that light and energy are carried as discreet packets called quanta.
I'm Michel Martin and this is TELL ME MORE from NPR News. Now it's time for our weekly visit to the Barbershop where the guys talk about what's in the news and what's on their minds. Sitting in the chairs for a shape-up this week are writer Jimi Izrael with us from Cleveland. Joining us from Boston, healthcare consultant and contributor to National Review magazine, Dr. Neil Minkoff. Here in our Washington, D.C. studios, Dave Zirin. He is sports editor at The Nation. And Corey Dade is a contributing editor for The Root. Take it away Jimi.
As we mentioned, the new police chief of Sanford, Florida, where the Trayvon Martin shooting took place, has now issued new guidelines for neighborhood watch groups and volunteers. We wanted to hear more about that, so we've called NPR correspondent Greg Allen, who's been covering the story. Greg, thanks so much for joining us once again.
GREG ALLEN, BYLINE: Oh, my pleasure, Michel.
MARTIN: So what specifically are the major changes called for in these guidelines?
This is TELL ME MORE from NPR News. I'm Michel Martin. We're going to spend the first part of this hour talking about a case in Florida that drew so much national attention at the end of last year and the first part of is one. And that's the killing of the unarmed teenager Trayvon Martin by the neighborhood watch volunteer George Zimmerman in Sanford, Florida. Now the new police chief in Sanford, Florida has made some big changes in the Neighborhood Watch Program there and we'll tell you about those.