U.S., Japan step up defense cooperation to counter N.Korea
The United States and Japan will increase their defense cooperation to deal with the threat from nuclear-armed North Korea, officials from the two allies said on Thursday. "In light of the serious situation we face, we are accelerating implementation of the 2015 guideline for the U.S.-Japan defense cooperation, and continuing to realign U.S. forces in Japan and Guam," U.S. Defense Secretary Jim Mattis told a news conference.

