Deputy Defense Secretary Paul Wolfowitz and Joint Chiefs of Staff Chairman Richard Myers fielded questions from members of the Senate Armed Services Committee. Kwame Holman reports with details.

Secretary of State Colin Powell announced Wednesday that the United States supports a bigger role for the United Nations in Iraq, signaling a shift in U.S. policy. Experts discuss this development.

In a speech Tuesday, President Bush defended the mission in Iraq as a critical component in the global war on terrorism. Two U.S. Senators who have traveled to Iraq offer perspective on the postwar situation and U.S. foreign policy.