The World's Mary Kay Magistad reports from Beijing on the eve of the 20th anniversary of the Tiananmen massacre. Many Chinese remember the event vividly, but it's a day the Chinese government would rather forget.

Our geography puzzler.

For today's Geo Quiz, we asked you to name a former Soviet Republic that's now making some changes to its map. Name changes, that is. The answer is Ukraine. Anchor Lisa Mullins speaks with Rostoslav Khotin, editor of the BBC's Ukrainian service.

Anchor Marco Werman examines the cultural and musical connections between Brazil and France. As people in both nations mourn the victims of Monday's crash of an Air France jet in the Atlantic, we hear from the operator of a club in Paris, Favela Chic, that's home to Brazilians and French.

Today on The World: Cairo's reaction to President Obama's speech to the Muslim world; Iran's reaction to last night's presidential debate in Tehran; Journalist John Hockenberry recalls the events surrounding the death and funeral of Ayatollah Khomeini 20 years ago in Tehran.

Anchor Lisa Mullins introduces coverage of reaction to President Obama's speech in Cairo today reaching out to the Muslim world. Reporter Ursula Lindsey spoke with some Egyptians in a Cairo cafe to get their response.

Watch the President's speech in its entirety

President Obama's Cairo Speech: full text with analysis

Anchor Lisa Mullins speaks with Tariq Ramadan, a professor of Islamic Studies at Oxford University, and Shibley Telhami, the Anwar Sadat Chair for Peace and Development at the University of Maryland, for analysis of President Obama's speech today in Cairo aimed at the Muslim world.

Anchor Lisa Mullins gets reaction to President Obama's speech in Cairo from Yossi Alpher, co-editor of BitterLemmons.org, an online dialogue between Israelis and Palestinians.

The World's Katy Clark tells us about how the White House tried to ensure that President Obama's Cairo speech got out to as many corners of the globe as possible.

The World's Aaron Schachter goes into the streets of Kabul to get reaction to President Obama's speech to the Muslim world.