Pence, kicking off a 10-day Asian tour in Seoul, spoke at a joint news conference with South Korean acting president Hwang Kyo-ahn one day after North Korea's latest failed missile test. Pence pointed to recent USA military strikes in Syria and Afghanistan as proof of President Trump's resolve.
North Korea's envoy to the United Nations said the regime was preparing for "any mode of war" triggered by potential U.S. military action, and said his country would respond to a missile or nuclear strike "in kind".
"North Korea would do well not to test his resolve - or the strength of the Armed Forces of the United States in this region", the vice president warned.
"Just in the past two weeks, the world witnessed the strength and resolve of our new president in actions taken in Syria and Afghanistan", Mr Pence said.
Trump's national security adviser, H.R. McMaster, said on Sunday that the United States, its allies and China were working on a range of responses to North Korea's latest missile test, citing what he called an worldwide consensus to act.
U.S. Vice President Mike Pence attends with South Korean acting president and prime minister Hwang Kyo-ahn during their joint press conference on April 17, 2017 in Seoul, South Korea.
"The president and his military team are aware of North Korea's most recent unsuccessful missile launch".
North Korean dictator Kim Jong-Un launched a failed missile test Sunday, after a strong show of force during the Day of Sun celebrations Saturday, when Kim's regime showcased new missiles and launchers during a large-scale military parade.
The latest launch - which failed when the missile blew up seconds after blast off - came a day after the North held a defiant massive military parade in Pyongyang showcasing almost 60 missiles - including a suspected new intercontinental ballistic missile.
In a press conference this afternoon he claimed it was "crystal clear" the United States and President Donald Trump were "hell bent" on prompting all out war with North Korea.
The vice-president earlier visited a military installation near the DMZ, Camp Bonifas, for a briefing with military leaders at the joint U.S. Last week, Trump said he would not declare China a currency manipulator, pulling back from a campaign promise, as he looked for help from Beijing, which is the North's dominant trade partner.
North Korea surprises with display of new missiles
North Korea is thought to have a small arsenal of atomic bombs and an impressive array of short- and medium-range missiles. Solid-fuel missiles can be launched with less preparation and require fewer support vehicles than liquid-fuel missiles.
North Korea revealed a special fighting force during a weekend military parade. He went on to say that any U.S. military action against North Korea would trigger an "all out war".
The visit came shortly after a failed North Korean missile launch that some claim may have been "thwarted by cyber attacks from the USA".
"All options are on the table to achieve the objectives and ensure the stability of the people of this country", he told reporters as tinny propaganda music floated across from the North Korean side.
It has denounced the USA deployment of an aircraft carrier group to the region, saying it would respond by "force of arms" to "reckless moves".
"There was a period of strategic patience, but the era of strategic patience is over".
Did the USA know this was coming? The operation was begun three years ago under President Barack Obama's administration. His late father, Edward, served in the Army during the Korean War and was awarded the Bronze Star on April 15, 1953.
Mr Hwang hailed the early deployment of the controversial U.S. missile defence system (known as Thaad) created to protect against threats from North Korea.
Any US action near the Korean Peninsula could provoke a devastating response.
"The threat is upon us", she said.
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