Former U.S. Ambassador to Japan Caroline Kennedy said Monday that Okinawa is the linchpin to the U.S.-Japan security alliance.She made the remarks as she sought understanding from 20 visiting high school and university students from Okinawa on the importance of the U.S. military presence in the southernmost Japanese prefecture.During their meeting in New York, the beginning of which was open to the press, Kennedy, the 60-year-old daughter of former U.S. President John F. Kennedy, said the U.S.-Japan alliance is one of the most important alliances in the world.She also said her service as U.…READ FULL ARTICLE