Today on The World: President Obama begins his Middle East charm offensive; We have the latest from Saudi Arabia, and look ahead to Mr. Obama's speech in Cairo; Also -- on the eve of the anniversary of the Tiananmen massacre, we learn what China's people remember, and what their government would rather forget.

Anchor Marco Werman speaks with musician Kim Alves, a multi-instrumentalist from Cape Verde who combines island dance rhythms with fiery guitar technique.

For today's Geo Quiz we were looking for the name of a city in Scotland where scientists and musicians have gotten together to recreate an ancient trumpet called the lituus. The answer is Edinburgh.

Ahead of the 20th anniversary of the Tiananmen Square protests, one former student leader recounts a particular moment of the violence.

Two American journalists in detention in North Korea face trial there this week. Some North Korea watchers suggest that if Pyongyang decides to release the women that might be a sign North Korea may be ready to talk about its nuclear program.

Our daily geography puzzler.

Anchor Marco Werman speaks with John Fish of American Underwater Search and Survey about the challenges of an undersea search. Investigators have descended upon a stretch of the Atlantic Ocean where floating debris was found a day after an Air France airliner went missing with 228 passengers on board.

Correspondent Anita Elash reports on the latest in the investigation into the disappearance of an Air France airliner yesterday. 228 people were onboard. Brazil's Air Force says search planes discovered some debris floating in the Atlantic Ocean today, though it's not yet clear whether it's from the missing jet.

The World's Alex Gallafent tells the story of Bohemian National Hall, a building built by and for the Czech community in New York City.

Anchor Marco Werman has an update on the ongoing confusion over which dignitaries will be attending the D-Day events in Normandy this weekend.