North Korea: With a Return to Missile Testing, a Knock on the White House's Door

After a hiatus of 521 days, North Korea has resumed its missile-testing regime. On May 9, the country launched its second flight test in less than a week of what appear to be short-range missiles. Its May 4 launch involved multiple missiles, possibly including several of the same type. North Korean missile tests always carry a message. The message this time is that it should not be ignored and that the current state of affairs is unacceptable....