Donald Rumsfeld was much pilloried for his musings on the "unknown unknowns" that bedevil defense planning. But an echo of that warning was floated Wednesday by another former Bush administration official as the election result became known.
The national security adviser under former U.S. President Jimmy Carter said Sunday that the United States should open direct talks with Iran over its nuclear program, and dismissed the current negotiations as "absurd."
With the transfer of power in Iraq now a done deal, the question arises: When should U.S. troops pull out? Two former presidential advisers strongly disagree on possible exit strategies, using comparisons to the Vietnam War as a reference point.