Japan, South Korea and the United States agreed Wednesday to strengthen their security cooperation over North Korean nuclear and missile threats, according to the Japanese government, as leaders from the countries held the first such trilateral meeting since 2017.The gathering took place as the change of the South Korean government in May is creating fresh impetus toward improving the soured bilateral ties between Tokyo and Seoul. It also comes amid speculation that Pyongyang's first nuclear test since 2017 could occur at any time.At the outset of the 23-minute talks on the sidelines of the…READ FULL ARTICLE