in the July/August issue of Foreign Affairs
"Deterrence is a way to make the best of a bad situation. Military action or, more precisely, the threat of it can buttress diplomatic prospects. But diplomacy should be the heart of U.S. policy toward both [North Korea and Iran] -- because it could succeed, because it must be shown to have failed before there is any chance of garnering support for other policies, and because all the other options are so unattractive".
(Full text here)