National Security: Our secretary of state tells the Chinese we'll restrain missile defense activities in Asia in exchange for their help in reducing the threat of a nuclear North Korea. Isn't this where we came in? In a news conference after meetings with China's top leaders on Saturday, Secretary of State John Kerry said the United States would reduce its missile defenses in Asia if North Korea abandoned its nuclear weapons program. Well, at least he didn't bow. In response to North Korea's threat to fire some of its latest missiles, including the road-mobile Musudan, amidst news that it can...