"With that said, I want to ensure that we are prepared for any eventuality".
The Governor of Guam has told people there to remain calm amid reports North Korea is examining a plan to strike the U.S. territory.
North Korea said on Wednesday it is considering a strike on the U.S. Pacific territory of Guam, hours after President Donald Trump said any threat from Pyongyang would be met with "fire and fury".
A Korean People's Army spokesman said in a statement carried by state-run KCNA news agency the plan would be put into practice at any moment once leader Kim Jong Un makes a decision.
The speaker of the Guam Legislature says he hopes the island can defend itself in the event of an attack from North Korea.
North Korea said it was preparing to send intermediate-range missiles near Guam, which was home to more than 160,000 United States citizens, including some 6000 members of the armed forces.
Guam's Democratic representative to Congress said Tuesday that North Korea's warning it might strike the U.S. Pacific territory missiles was being taken "very seriously" because "we've been living with this for the last few years". But it is as steeped in American culture as any small city on the mainland - even if shoppers at its Kmart (the biggest in the world) can look outside and see a lush Pacific island setting.
Bordallo called on President Donald Trump to show "steady leadership" and work with the global community to de-escalate tensions and stop North Korea advancing its weapons programme.
The United States has remained technically at war with North Korea since the 1950-53 Korean conflict ended without a peace treaty.
Around two dozen North Korean "missile-launch sites, testing grounds and support facilities" would be apparent targets of the United States military planes, according to sources cited by NBC.
"While at home station my crews are constantly refining their tactics and techniques so that we can better integrate with our counterparts from other nations", said Lt. Col. Daniel Diehl, 37th EBS, commander.
"Strong fears are spreading that nuclear weapons may be used in the not-so-distant future", he said.