News from NPR

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.

The Navajo Nation is accusing the retailer of trademark infringement. Members say Urban Outfitters sold goods that used the Navajo name and symbols without permission. Host Michel Martin talks with Navajo Times contributor Bill Donovan about the case, and why some Native Americans find certain uses of the Navajo name offensive.

Mitt Romney has taken the lead in voter support in Pennsylvania, according to a new poll from Public Policy Polling which shows the Republican frontrunner ahead of Rick Santorum, the former U.S. senator from the Keystone State, 42 percent to 37 percent. That lead was just on the 4.9 point margin of error, suggesting a tie. That's bad news for Santorum, however, as he dropped six percentage points while Romney gained 17 percent from a month ago.

The number of people filing first-time claims for unemployment insurance stayed around a four-year low last week, the Employment and Training Administration just reported.

It says there were 357,000 such applications, down 6,000 from the previous week's revised figure of 363,000.

Claims have been running at the lowest rate since March and April 2008 for several weeks now.

Finding out that you have cancer greatly increases the risk of death by heart attack or suicide, according to a new study. That risk is especially big in the first week after getting the bad news.

They're teeing off this morning in Augusta, Ga. It's the Masters, the first of the "major" tournaments for men each year.

Fans had a chance to be immortalized in the stadium by buying personalized bricks. The animal rights group PETA bought one. The group's brick contained a hidden message that spells out an anti-fishing website.