Kim said Trump "will face results beyond his expectation" in a statement released early Friday, three days after Trump gave his speech. "Dotard" was the official English translation provided by state news agency KCNA for the Korean "늙다리미치광이" ("neulg-dali-michigwang-i"), which literally translates as "old lunatic". North Korea relies heavily on textiles, it's one last major source of foreign revenue.
"Kim Jong Un of North Korea, who is obviously a madman who doesn't mind starving or killing his people, will be tested like never before!"
Reuters news agency reported earlier in the day that China's central bank had ordered financial institutions to implement United Nations sanctions rigorously after frequent complaints from Washington that Beijing was leaving open too many loopholes.
South Korea's Unification Ministry spokesman Baik Tae-hyun told reporters Friday that North Korea must immediately stop such a provocation and return to talks on its nuclear disarmament.
Trump has traded rhetorical barbs with North Korea as those tests were carried out.
In response, the United Nations passed a range of new sanctions against North Korea, including petroleum and textiles restrictions.
This would be in response to US President Donald Trump's threats of military action, Ri said.
The US treasury has been authorised to target firms and financial institutions conducting business with North Korea.
In an escalation of the war of words between the United States and North Korea, Trump sent a pre-dawn tweet on Friday saying: "Kim Jong Un of North Korea, who is obviously a madman who doesn't mind starving or killing his people, will be tested like never before!"
Federal Reserve announces start to modestly reducing bond holdings
Also, the Fed started buying massive amounts of US government bonds to help reduce long-term interest rates and support growth. The program pushed the Fed's balance sheet from just under $1 trillion to $4.5 trillion in bonds and other securities.
Similar above-ground tests have not been conducted since the Cold War and North Korea's nuclear detonations have all been occurred underground. However, the underlying message it appears to be giving is one of disbelief that a USA president is not backing down and is making such a forceful threat.
"The United States has great strength and patience, but if it is forced to defend itself or its allies, we will have no choice but to totally destroy North Korea", he said.
North Korea has fired two ballistic missiles over Japan's north Hokkaido region in the past month as part of a series of tests that experts say have illustrated unexpectedly rapid advances.
"Rocket Man is on a suicide mission for himself", he said.
Narang said a test high enough over the ocean would limit the radioactive fallout but risks included damage from an electro-magnetic pulse, something Pyongyang has hinted it might employ on an attack on the United States or its allies.
However, the rhetoric was starting to rattle some in other countries.
Lewis, from the Middlebury Institute of International Studies' James Martin Center for Nonproliferation Studies, agrees with most experts that we'll only know for certain when they do it.
The 2018 Games are to be staged in Pyeongchang, just 80 km (50 miles) from the demilitarized zone between North and South Korea, the world's most heavily armed border. Satellite photos of the area after the Sept 3 quake showed numerous landslides apparently caused by the massive blast, which North Korea said was an advanced hydrogen bomb.