DPRK's military said in a statement on Thursday that it would prepare a plan by mid-August to strike Guam, a us island territory in the Western Pacific, with intermediate missiles.
President Donald Trump tweeted Friday that the US military is "locked and loaded" if North Korea acts "unwisely", escalating an exchange of threats between the nuclear-armed nations. In talking about the heightened worldwide attention to the island, Margaret Metcalfe, director of Calvo's Washington office, said: "None of this is good publicity".
"Good morning, good morning", the president said to Calvo. Nobody asked for it.
"We will see what happens. We certainly don't what to do anything that would put our families at risk". Threatening to fire a volley of missiles toward a major US military hub _ and the home to 160,000 American civilians _ may seem like a pretty bad move for a country that is seriously outgunned and has an terrible lot to lose.
And Trump seems to believe there's no such thing as bad publicity.
"I don't think anyone can really predict what our president may offer, because he is one of those thinkers outside the box", Metcalfe said. And I wanted to call you and say hello.
The new leader was initially skeptical about this, and part of the reason why he was elected is because he campaigned on a mildly pro-sovereign platform, which made him stand out against the more traditional pro-American candidates.
North Korea said in turn that it would complete plans to launch missiles into the waters near Guam by mid-August.
"Guam is American soil ..."
President Donald Trump went on to assure Governor Calvo that Guam is safe. He also praised the response from the president, who said that an attack on the United States would be met with "fire and fury."
"Hopefully it will all work out", he said. "With all the criticism going over there, from a guy that's being targeted we need a president like you".
Trump on Friday sought to project military strength, only dialing back slightly throughout the day.
"I just wanted to pay my respects, and we are with you 1,000 percent".
Guam's Governor Eddie Baza Calvo posted an excerpt of his call with the president on Facebook.
"Mr. President, as the governor of Guam and as an American citizen, I have never felt more safe or confident with you at the helm", Governor Calvo told President Trump.
It highlights an interesting feature of South Korea, a strong US ally, trading partner and fellow democracy where there can seem to be as much, maybe more, worry about Trump's unpredictable style of leadership as there is about archrival North Korea.
"I wish that the superpowers of the world would be able to come out with a different way to fix their problems, you know, instead of having to involve other places that don't even pose a threat".
Others, however, are more critical, saying Trump needs to tone down his antagonistic language.
North Korea has taken a major step forward in realizing its goal of becoming a nuclear power, according to a Washington Post report on a confidential USA intelligence assessment that concludes Pyongyang has developed a nuclear warhead capable of fitting.
Young graduate Choe Kyong Song says North Koreans don't want war, but then went on to repeat the kind of bold rhetoric that authorities favor - the idea that any conflict with the US would result in North Korean victory and the reunification of Korea.
Moon, a liberal who favours engagement with the North, has kept mostly quiet over the past week.