In the documentary If A Tree Falls, director Marshall Curry tells the story of the rise and fall of the Earth Liberation Front, a group that the FBI once described as America's number one domestic terrorism threat. The film has been nominated for an Academy Award.

NPR's Neal Conan reads from listener comments on previous show topics including the concept of "black cool," Jeremy Lin and "Linsanity," and which country's constitution Egypt should use as an example.

The visit of Chinese Vice President and heir apparent Xi Jingping to the United States, raised questions about internal Chinese politics — from human rights to technological development — and how the country will be governed in the future.

Americans have tended to save more and spend less in the years since the economic downturn in 2008. But according to a survey from BankRate.com, only 54 percent of Americans have more emergency savings than credit card debt.

Virginia state legislators passed a bill requiring women to receive an ultrasound — which is conducted via transvaginal probe in the first 12 weeks of pregnancy — before having an abortion. Dahlia Lithwick, senior editor for Slate magazine, calls the proposed law "an abomination."

International tension over Iran's disputed nuclear activities was ratcheted up today, when an Iranian general warned that his country would take pre-emptive action if its national interests were threatened.

Reuters reported Gen. Mohammed Hejazi made his comments in an interview with the semi-official Fars News Agency.

Thinking about getting a body piercing? Who hasn't, right?

Well, one thing to consider is that about 20 percent of the time there are complications from the procedure, such as infection or scarring, a fresh review of the medical literature finds.

Piercings of the bellybutton and upper ear are especially prone to problems.

Family, friends and fans flocked to New Jersey during the weekend for the funeral of Whitney Houston. The music legend was public about her struggle with substance abuse, and her daughter is one of millions who had to cope with that addiction. Host Michel Martin and a panel of parents discuss how parents' addictions affect their kids.

Today is Mardi Gras, and people all over the world are celebrating with decadent meals, carnivals and parades.