"We have lines of communications to Pyongyang," Secretary of State Rex Tillerson said. The State Department later said North Korean officials are not "ready for talks regarding denuclearization."
North Korean Foreign Minister Ri Yong Ho says that under international law, his country can legally shoot down U.S. military planes — even if they're not in North Korea's airspace.
North Korea's foreign minister referred to Pyongyang's "nuclear hammer of justice," when he spoke at the U.N. Saturday, the same day the U.S. flew bombers near North Korean shores.
China accounts for the vast majority of North Korea's trade. President Trump has accused China of not doing enough to push back North Korea's nuclear program.
It is the latest in a tit-for-tat between President Trump and the North Korean leader. In a tweet on Friday, the president said Kim Jong Un "will be tested as never before!"
In an extraordinary statement released through state media, the North Korean leader says the U.S. president is "surely a rogue and a gangster fond of playing with fire, rather than a politician."
In this first address to the United Nations General Assembly, President Trump took on the global threats posed by North Korea and Iran and reiterated his "America First" approach to policy.