An American territory that hosts a significant military contingent, Guam has found itself in the crosshairs of a geopolitical feud sparked by Donald Trump promising "fire and fury" in response to further threats.
Calvo had the president on speaker phone, and posted a video of the exchange to his Facebook page.
A video shows Gov. Eddie Baza Calvo laughing and joking with the president as they discuss everything from the readiness of the United States military to tourism. "And we are with you 1,000%".
North Korea's threat to launch ballistic missiles around the U.S. territory of Guam has terrified residents of the small Micronesian island.
They called me from the White House this morning and both assured me that the people of Guam are safe.
Calvo said that as the governor of Guam and as an American he "has never felt so confident" in his territory's security. They should have had me eight years ago, somebody with my thought process, because that was the time. "We've got 95 percent occupancy, and after all this stuff calms down, we're going to have 110 percent occupancy". The Senate armed services committee member also noted that "I don't want to trust one intel report, we've learned from Iraq that you do need to be cautious".
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Defense Minister Itsunori Onodera told the Japanese parliament that its American-designed Aegis destroyers are capable of shooting down North Korean missiles and that any attack on Guam would be considered an "existential threat to Japan" under defense treaties with the United States. "I'll talk to you anytime you need, and again, it looks like just a attractive place".
"All over the world, they're talking about Guam, and they're talking about you, and I think tourism, I can say this, your tourism, you're going to go up like tenfold with the expenditure of no money, so I congratulate you".
Before speaking to Mr Calvo, Mr Trump told reporters in New Jersey that he believed Guam would be "very safe" and threatened North Korea with "big, big trouble" if it launched an attack.
The sheet urges people to take cover as quickly as possible, "under concrete structures or below ground if possible".
On Friday, the president had issued fresh threats of swift and forceful retaliation against nuclear North Korea, declaring the USA military "locked and loaded" and warning that the communist country's leader "will regret it fast" if he takes any action against US territories or allies.