By backpedaling on a campaign promise to move a U.S. Marine Corps airbase from Okinawa, Japanese Prime Minister Yukio Hatoyama may have nonetheless secured additional airborne cruise missile and tactical ballistic missile defenses for Japan. China is seen as the cruise missile threat since it has developed a new, faster, long-range weapon that can be launched from its Su-27MKK strike fighter fleet. North Korea has the greater fear factor, however, because of its suspected nuclear ballistic missile capability and its government’s erratic behavior and apparent aggressions, such as the alleged sinking of a South Korea warship. Okinawa is already home...