The World's Jason Margolis reports on a group of people we haven't heard from in a while: global warming skeptics. They believe climate change isn't real and that governments shouldn't regulate greenhouse gasses.

Online extra interview -- Why the public perceives the science on climate change differently:

Correspondent Terry FitzPatrick reports from South Africa about a heated debate over the country's new pledge of allegiance. South African officials say it promotes unity. But critics say it injects politics into the classroom.

China's parliament opens today. As The World's Mary Kay Magistad reports, China's leaders say they want government to be more transparent, perhaps even more democratic. But only up to a point.

The World's Alex Gallafent listens to some of the voices of the presidential candidates, and considers how the sound of a voice can convey authority.

Americans are still marveling at the idea that a black man or a white woman will be the Democratic nominee for president. But as The World's Gerry Hadden reports Europeans say it's no big deal.

Anchor Lisa Mullins speaks with the BBC's James Ingham for the latest on the crisis involving Ecuador, Venezuela, and Colombia. Venezuela said today that its deployment of troops to the border with Colombia is nearly complete now. The crisis was sparked by a weekend raid by Colombian troops who crossed over into Ecuador to kill a Colombian FARC commander.

Entire program - March 5, 2008

The World's Marco Werman reports on how loud music has been used at times as an interrogation tool by the US government. The practice isn't officially approved of, but some researchers say it's often used by soldiers and interrogators out in the field in places like Iraq.

Anchor Lisa Mullins reports on Britain's Royal Shakespeare Company mounting a campaign to get elementary kids start studying The Bard by age eleven -- at the latest.

Today's Geo Quiz asks for the names of 3 countries who were among the first to pass laws making voting mandatory. The three countries we had in mind are Belgium, Argentina and Australia.