North Korean state media has reported that the country is considering plans to strike Guam this month.
Governor Eddie Calvo describes his island to those who don't know it as a "mini Hawaii" and puts the chances of a direct missile hit at a million-to-one because of the multi layers of Pacific defences, the last being those on Guam itself.
Guam is about 2,100 miles (3,380 kilometers) southeast of Pyongyang and 3,800 miles (6,115 kilometers) west of Honolulu in the Pacific Ocean.
Though local officials downplayed any threat, people who live and work on the island, which serves as a launching pad for the USA military, said Wednesday they could no longer shrug off the idea of being a potential target. The U.S. territory is home to Andersen Air Force Base.
It's not the first time North Korea has threatened Guam, which is a crucial, strategic hub for US forces in the Pacific. Leader Kim Jong Un would then decide whether to proceed with the strike on the US territory.
The U.S. military has said it plans to increase its presence on Guam and will move thousands of U.S. Marines now stationed in Japan to the island between 2024 and 2028.
Andersen Air Force Base houses a Navy helicopter squadron and Air Force bombers that rotate to Guam from the USA mainland, including the B-2 stealth bomber, B-1 and B-52. Altogether, 7,000 US military personnel are stationed on Guam. The air base was built in 1944, when the US was preparing to send bombers to Japan during World War II. It noted which weapons it would use (intermediate range ballistic missiles), how many of them (four) - and the timing: sometime before the end of this month.
The U.S. took control of Guam in 1898, when Spanish authorities surrendered to the U.S. Navy.
Similar threats in 2013 led Guam's U.S. Congresswoman Madeleine Z. Bordallo to advocate for the THAAD system, she said in a statement Wednesday. President William McKinley ordered Guam to be ruled by the U.S. Navy.
Resident Isaac Camacho, 19, says he feels Guam's relationship with the US mainland is "a little misunderstood on their part".
Having experienced a Japanese invasion in World War Two and countless earthquakes and super-typhoons, there was no United States community better prepared than Guam "for any contingency", Calvo, dressed in a light blue tropical shirt, said in an interview at his office.