About 7,000 USA soldiers and their families live on the island, which has a population of 160,000, according to the Associated Press.
US National Security Adviser H.R. McMaster recently declared the United Stated was prepared to wage a "preventive war" against North Korea if that was to be deemed necessary - although the current deployment of the US aircraft carriers does not seem to bode a military operation.
"There's nothing to worry about at all and we'll just go on with our excursion and happily shop around".
Jeff Bell, 32, a civil and mechanical engineer, moved back to Guam seven years ago. "He does something in Guam - it will be an event the likes of which nobody's ever seen before, what will happen with North Korea", Trump told reporters Thursday in Bedminster, New Jersey.
Two days after North Korea laid out its plans to strike near Guam with unsettling specificity, there was no observable march toward combat, despite the angry rhetoric from both sides.
Guam, an unincorporated US territory, is a strategic outpost about 2,100 miles (3,400 kilometers) south-east of Pyongyang. According to the U.S. Department of Defense, Ulchi-Freedom Guardian involves about 40,000 troops, along with civilian South Korean government personnel who train their civil defense responses.
Yesterday, Trump said that his threat earlier this week to unleash "fire and fury" on Pyongyang, if it launched an attack, may not have been tough enough.
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He said: "It's not because I have always done it that I am going to do it". He added: "I think we played everything so we don't lose this game".
There have been many periods of heightened tensions between the two countries over the years, especially in April and August, when South Korea and the United States conducted joint military exercises that North Korea considered preparation for an invasion. The document is titled "Preparing for an Imminent Missile Threat".
"We always maintain a high state of readiness and have the capabilities to counter any threat, to include those from North Korea", Lt. Col. Christopher Logan, a Pentagon spokesman, told Business Insider.
Officials in Guam are giving citizens advice on how to survive such an attack.
"We take it lightheartedly", said Mark Alex, 26.
Other residents are anxious about the political atmosphere and the government's ability to find a peaceful solution.
Defense Minister Itsunori Onodera said it would be legal for Japan to intercept a missile aimed at Guam. She said, "I don't see a military solution and I don't think it's called for".
"I think it probably failed fairly late in the process", said John Schilling, a consultant with 38 North, a respected website on North Korea at Johns Hopkins University's School of Advanced International Studies. Seoul is 2,000 miles (3,200 kilometers) to the northwest, Tokyo is 1,500 miles (2,400 kilometers) north and Taipei is 1,700 miles (2,700 kilometers) west.
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With North Korea threatening to send a salvo of ballistic missiles close to a US military hub in the Pacific, pressure could grow for Washington to put its multibillion-dollar missile defence system into use and shoot them out of the air before they can pose a real threat.
"That U.S. can stop North Korea from all of this". US bombers have flown over the Korean Peninsula several times to show American strength after Pyongyang's missile tests.
Asked Firday if the US was going to war, he said cryptically, "I think you know the answer to that".
Guam's Homeland Security Adviser George Charfauros said Friday it would take 14 minutes for a missile fired from North Korea to reach Guam. "There's even a THAAD system in South Korea now".
Mr Tillerson said: "Americans should sleep well at night". Trump said. He did not specify what they might be. "It's just like a regular business day".
"It's not bad at all, no chaos", said Mariah Sablan, who works for Golden Dragon Travel Inc.
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A auto plowed into a group of the counter-protesters Saturday, killing a 32-year-old woman and leaving 19 others hurt. Trump condemned the incident as an "egregious display of hatred, bigotry and violence, on many sides".
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