The U.S. State Department on Friday called Japan a "global leader" in promoting nuclear nonproliferation, after a Japanese security official recently suggested that the country should possess nuclear weapons for its defense."The United States will maintain the world's most robust, credible and modern nuclear deterrent to protect America and our allies, including Japan," a department spokesperson said in response to the Japanese official's controversial remarks.The spokesperson, who provided the comments on a background basis, described Japan as a "valuable partner to the United States" in "…READ FULL ARTICLE