It does sound that way, but the United States has had a "national emergency" in place with regard to North Korea since 2008.
The president made the dramatic revelation during a briefing Thursday, hours after revealing that North Korea has already returned the remains of 200 USA troops missing from the Korean War.
Trump said afterward that he believes Kim is serious about giving up nuclear weapons and transforming his stunted economy.
Also Friday, the US and South Korea agreed to indefinitely suspend two exchange program training exercises to support diplomatic negotiations with North Korea, the Pentagon said.
Trump's remarks about the remains on June 20 were part of a broader description of progress made in North Korea.
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"President Obama said that North Korea was our biggest and most unsafe problem", he tweeted. "Detailed negotiations have not begun", he said.
President Donald Trump has extended a decade-long state of national emergency over the threat posed to the United States by North Korea's nuclear weapons program.
Jonathan Ernst / Reuters US President Donald Trump and North Korea's leader Kim Jong Un meet in a one-on-one bilateral session at the start of their summit at the Capella Hotel on the resort island of Sentosa, Singapore June 12, 2018.
It will depend on which facilities it destroyed at Sohae - one of several sites that have been used for the development of the North's ballistic missiles, said Jenny Town, a research analyst on North Korea at the Stimson Center think tank in Washington.
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It is separate from USA sanctions related to North Korean human rights abuses and a long list of worldwide penalties imposed over Pyongyang's nuclear and ballistic missile testing. "And they blew up sites where they test and do the testing", the president said.
However U.S. Defense Secretary Jim Mattis said he was "not aware" of any North Korea denuclearization measures at this time, and the U.S. -based North Korea monitoring group 38 North recently said there had been no sign of any activity toward dismantling any other missile test site in North Korea.
A year ago 7,500 U.S. soldiers and 3,000 South Korean troops took part in the Freedom Guardian exercises, which the Pentagon has always maintained are purely defensive.
"We have 100 years of mateship with the United States this year, of course we would welcome him here", Mr Pyne told reporters in Adelaide on Saturday. Trump added that he would extend tough economic sanctions on Pyongyang for another year.
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