On April 14, US media said that US President Donald Trump might order a strike against North Korea in the event Pyongyang chose to carry out another nuclear weapon test.
Earlier, US vice-president Mike Pence warned North Korea against testing Trump's "resolve", and said that former US President Barack Obama's "strategic patience" policy had ended.
Tensions have risen in the region of late, as the Democratic People's Republic of Korea (DPRK) has conducted multiple missile tests and two nuclear tests in the past 18 months, with the United States' recent deployment of an aircraft carrier unit to the region after holding large-scale "war games" near the peninsula also stoking concerns.
"We know that North Korea has got cyber ability and we know the United States does as well as electronic warfare capability. You read Clinton's book and he said, 'Oh, we made such a great peace deal, ' and it was a joke", Trump said in an interview on Fox & Friends that aired Tuesday.
While inspecting the Demilitarized Zone between North and South Korea, Pence warned Pyongyang that after years of testing the USA and South Korea with its nuclear ambitions, "the era of strategic patience is over".
The Trump administration hasn't ruled out a military strike against North Korea. The deployment of the anti-missile system Terminal High Altitude Area Defence (THAAD) by the United States in South Korea is progressing fast.
The unannounced visit Monday at the start of his 10-day trip to Asia was a US show of force that allowed the vice president to gaze at North Korean soldiers from afar and stare directly across a border marked by razor wire.
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A senior North Korean official said Monday that the US has created "a unsafe situation in which a thermonuclear war may break out at any minute".
Footage of an intermediate-range Musudan ballistic missile, called Hwasong-1 in North Korea, being launched was shown on the screen at the hall, according to the TV broadcaster.
Speaking to Fox News about rising tensions with Pyongyang, Trump repeatedly referred to "the gentleman" leading North Korea as an individual who had persistently outwitted U.S. administration after administration, at least as far back as the Clinton era of the 1990s.
"Our military is building and is rapidly becoming stronger than ever before".
President Trump has signaled that he will not hesitate to take military action against enemies of the United States, as evidenced by his bombing of a Syrian airfield and an ISIS cave in Afghanistan last week. Trump tweeted on Sunday.
"China has real ability to sort of impede the supply chain into North Korea".
"In the case of our super-mighty preemptive strike being launched, it will completely and immediately wipe out not only USA imperialists' invasion forces in South Korea and its surrounding areas but the US mainland and reduce them to ashes". "I think it's important to see them heading in this direction".