Former U.N. Secretary-General Kofi Annan began formal mediation talks Tuesday in Kenya, where post-election violence has killed hundreds and driven thousands from their homes.

By PBS News Hour

U.N. Secretary-General Kofi Annan announced that the European Union had agreed to provide 7,000 troops, or nearly half the expanded peacekeeping force, to southern Lebanon. Analysts discuss the U.N. mission.

At an international conference held in Rome on Wednesday, world leaders were unable to reach an agreement on how to end the fighting between Israel and Hezbollah. Analysts discuss the meeting and international efforts to establish peace in the region.

United Nations Secretary-general Kofi Annan discusses challenges facing his organization including the ongoing crisis in Sudan's Darfur region, Iran's nuclear ambitions and the U.N.'s relationship with the United States.