South Korea's top nuclear envoy Lee Do-hoon says the U.S. is ready to engage in dialogue with North Korea.
Lee arrived in Seoul after discussing the outcome of the second North Korea-U.S. summit with his counterpart Stephen Biegun in Washington.
Upon his arrival, he told reporters that South Korea and the U.S. had good talks.
He also said the U.S. firmly believes the Hanoi summit was productive and constructive.
