John Negroponte, the new U.S. Ambassador to Iraq, discusses the search for security and stability in Iraq, his unique role as an ambassador there as the country prepares to accept sovereignty.

While the war in Iraq has dominated recent headlines, the U.S.-led effort to combat al-Qaida and Taliban elements in Afghanistan continues. Afghan President Hamid Karzai discusses efforts to hold elections this September and the need for more peacekeepers to stabilize…

As the one year anniversary of the start of the Iraq war approaches, former top U.N. weapons inspector Hans Blix discusses his perspective on the debate over the status of Iraq's weapons of mass destruction program and his new book…

Ralph Nader spent the first day of his presidential campaign defending himself against allegations that his candidacy will be a detriment to the Democratic presidential nominee. Jim Lehrer speaks with Nader about the aims of his presidential bid.