U.S. Secretary of Defense Leon Panetta (left) listens Sept. 17, 2012, to a question from U.S. military personnel stationed at Yokota in Japan. Panetta, who is on the first official stop of a three nation tour to Japan, China and New Zealand, says that U.S. and Japanese officials have agreed to put a second missile defense system in Japan. The exact location has not yet been determined. (Associated Press)

Photo by: Larry Downing

U.S. Secretary of Defense Leon Panetta (left) listens Sept. 17, 2012, to a question from U.S. military personnel stationed at Yokota in Japan. Panetta, who is on the first official stop of a three nation tour to Japan, China and New Zealand, says that U.S. and Japanese officials have agreed to put a second missile defense system in Japan. The exact location has not yet been determined. (Associated Press)