In a speech to mark the 80th anniversary of Korea's liberation from Japanese colonial rule, Lee said he would restore the so-called September 19 Comprehensive Military Agreement, a de-escalation measure that halted some military activities at the border between North Korea and South Korea.

SEOUL, South Korea (AP) — South Korea’s new President Lee Jae Myung will travel to Washington later this month to meet with U.S. President Donald Trump, Lee’s office said Tuesday, for talks on trade and defense cooperation in the face of nuclear-armed North Korea and other threats.

North Korea is stepping up criticism of South Korea's new President Lee Jae Myung as he prepares for his first summit with U.S President Donald Trump, calling Lee's efforts to engage with Pyongyang a "pipedream".