North Korean leader Kim Jong-un has said the country's progress would not be deterred by any changes in the security environment at the ongoing party congress, state media reported Tuesday. But he did not issue any message to South Korea or the United States despite their continued overtures to resume dialogue, in a possible sign that the North may leave room for a policy shift amid the fluid international situation. "No challenge or change in the situation can delay or check our advance," Kim told the congress of the ruling Workers' Party of Korea the previous day, the Korean Central News Agency (KCNA) said. He also called for more boldness in "overcoming and eliminating backwardness and evil practices" in his "concluding" speech to the congress, according to the KCNA. The party congress opened Thursday to review policy outcomes from the previous 2021 congress and set new goals for the next five years. But in a speech, Kim made no mention of South Korea and the U.S., which have extended overtures to resume diplomacy with Pyongyang. It is rare for the North Korean party congress to avoid s