Nuclear Diplomacy: President Obama has sent a "personal" letter to North Korean leader Kim Jong Il, hoping to coax him back to the table to talk about cutting his nation's nuclear program. Good luck with that. Repeated U.S. entreaties to the hermit state to cut its nuclear arsenal have availed us nothing. Just this month, U.S. envoy Stephen Bosworth traveled to North Korea with a bunch of new diplomatic carrots for the regime. The result? Bosworth put it this way, in classic diplomatese: "We identified some common understanding on the need for and a role of six-party talks and the...