President Trump has cancelled a summit with Kim Jong-un following what he called "tremendous anger and open hostility" on the part of the North Korean leader.
No sitting American president has ever met with a North Korea leader.
April 27: In the first inter-Korean summit in more than a decade, South Korean President Moon Jae-in and Kim met in the demilitarized zone separating the two countries.
To his credit, Mr. Trump has accepted the urgency of solving the North Korean threat.
One senior official said there had been "a trail of broken promises" from North Korea "that has given the United States pause".
Another possibility is increased North Korean cyber attacks. In a statement carried by state media, he said Trump's decision was "very regrettable" and showed how deep-rooted the hostility is between the USA and North Korea, and showed "how urgently a summit should be realized to improve ties".
"We got a lot of dial tones", Pompeo said, adding it was disappointing but "frankly not a surprise".
USA president cancels summit with North Korean leader
Trump on Thursday left open the possibility for future meetings to take place if Kim takes "constructive" steps toward peace. That explosion collapsed the complex's north tunnel, which was used for five nuclear tests between 2009 and previous year .
Moon was speaking at an emergency meeting of his top security officials in Seoul after Trump announced he was canceling the summit because of North Korean "hostility".
Kim says North Korea's "objective and resolve to do our best for the sake of peace and stability of the Korean Peninsula and all humankind remain unchanged".
Mr Pompeo, asked about a report that the South had not been informed before the president's letter was made public, said simply: "We are locked in to the Republic of Korea".
Trump's move sent global share markets sharply lower before they regained some footing.
The Trump administration has signalled it is considering further sanctions against North Korea under its "maximum pressure" campaign.
North Korean leader Kim Jong-un, left, and Chinese President Xi Jinping shake hands in Beijing, China.
It also was unhappy about the North's failure to allow worldwide observers to verify the dismantling of its Punggye-ri test site, the staging ground for all six of its nuclear tests which was buried inside a mountain near the border with China.
The senior White House official said that among North Korea's broken promises was one to allow experts to witness the dismantlement of the site, which meant there was no one there to verify what actually occurred.
M&S stores in Shropshire avoid the axe - for now
Online shopping accounts for 22% of non-food retail sales in the United Kingdom , according to the British Retail Consortium. He said that where stores have already closed, "encouraging" numbers of consumers were now shopping at nearby stores.
North Korea's announcement of its plan to destroy its only nuclear test site had been widely welcomed as a positive, if largely symbolic, step.
The Pentagon said it was too early to give an assessment, but US officials and experts say the site could be put back into service or re-established elsewhere.
In a letter to Kim, the Republican firebrand described the cancellation as a "missed opportunity" and a "truly sad moment in history". Further complicating matters, advisors within the White House seemed split on how to handle Kim, and the United States president insists in general on ignoring diplomatic experts.
"We expect that there will be some type of cyber-retaliation, most likely denial-of-service or other disruptive attacks against USA government departments or military networks, defence contractors, and large American multinationals", said Priscilla Moriuchi, former head of the National Security Agency's East Asia and Pacific cyber threats office.
On this occasion Trump wrote that he was praying to God the USA won't need to use its "massive and powerful" nukes.
North Korea's pursuit of nuclear weapons prompted fears of war past year after it said it tested an H-bomb and developed a missile capable of hitting the United States. Although the chances of success were uncertain, the White House had even unveiled a commemorative coin with the profiles of Trump and Kim to herald the "peace talks". Kim called Trump mentally deranged. "We have to get it right", he said.
"It's only recently that this has been taking place and I think I understand why it's been taking place", he said.
Truck dumps 18 000kg of chicken feathers on highway
The News Tribune newspaper of Tacoma reports traffic backed up for 11 miles (18 kilometers) as crews scooped up the feathers. The feathers were reportedly being transported from Foster Farms. "Fowl way to start the day", one Twitter user replied.