For today's Geo Quiz, we were looking for the name of the German Antarctic research station located at the edge of Adka Bay in the Weddell Sea. The answer is Neumayer Station. Scientists there have placed microphones underwater to listen in on the sounds of whales, seals, and crashing icebergs.

Laura Lynch reports from Zimbabwe on a musical group that defies the authoritarian government of President Robert Mugabe. The group is called Rainbow Warriors -- and their songs praise Zimbabwe's opposition and criticize Mugabe. They've been forced to go into hiding, after the government arrested them and warned them not to perform again.

Entire program - Apr 8, 2008

The World's Matthew Bell reports on Iran's announcement that it's begun to install thousands of new centrifuges at the country's main nuclear plant. The Iranian government took the step in defiance of international calls to freeze its nuclear program.

Gen. Petraeus

Anchor Lisa Mullins speaks to Tufts University professor Vali Nasr about the role Iran plays in the war in Iraq. Top US commander General David Petraeus told a Senate committee today that Iran played a direct role in last weeks violence in Iraq.

Ursula Lindsey reports on a best-selling book based on conversations with Cairo taxi drivers. The English translation of "Taxi" comes out today. The Egyptian cabbies in the book speak frankly about their personal problems and about politics and economic hardship.

Anchor Lisa Mullins speaks with Steve Coll, author of "The Bin Ladens: An Arabian Family in the American Century." The book is a profile of the family that produced the al Qaeda leader.

Bin Ladens

Bin Ladens

Extended version of the interview

The World's Katy Clark reports on continuing calls for world leaders to boycott the opening ceremonies of this summer's Beijing Olympics.

The World's Alex Gallafent on the controversial history of the Olympic torch relay. The modern tradition of the relay started on the eve of the 1936 Olympic Games, hosted by Nazi Germany.

For today's Geo Quiz we're looking for the name of a Brazilian state that borders Bolivia to the south and Peru to the west. The Brazilian government has opened a factory in this state to produce condoms made from rubber harvested in the Amazon rainforest.