Mr. Obama took a giant step beyond the Bush administration's "Afghanistan policy" when he named the issue "AfPak" -- Afghanistan, Pakistan and their shared, Pashtun-populated border. But this is inverted. We suggest renaming the policy "PakAf," to emphasize that, from the perspective of U.S. interests and regional stability, the heart of the problem lies in Pakistan.

Carter, Deutch, and Zelikow addresses the threat of Catastrophic Terrorism in Foreign Affairs.