South Korean President Moon Jae-in (holding a mic) speaks to reporters while aboard Air Force One en route to Washington on June 28, 2017, for his summit with U.S. President Donald Trump later in the week (Yonhap)

He said that North Korea's nuclear freeze and reduction of joint military exercises between South Korea and the United States cannot be linked saying that has been the official unchanged position of South Korea and the United States. Moon's remarks came after his special security adviser, Moon Chung-in, claimed Seoul and Washington may consider scaling back joint military drills staged in South Korea should the North freeze its nuclear activities.