Mr Tillerson said: "We do not seek a regime change, we do not seek the collapse of the regime, we do not seek an accelerated reunification of the peninsula". Even conventional weapons being used by North Korea has the potential to kill scores of people in nearby Seoul, South Korea.
The Trump administration's ban on U.S. citizens travelling to North Korea will take effect early next month.
"Until North Korea agrees to sit down under the terms laid out by the United States", Kim told VOA's Victor Beattie, "to first, freeze and then to eventually denuclearize, then I believe the talks will be a hard proposition for the United States".
"We don't think having a dialogue where the North Koreans come to the table assuming they're going to maintain their nuclear weapons is productive", he warned. Tillerson, however, expressed hope that Washington and Pyongyang could resolve their issues through negotiations.
President Donald Trump is ready to go to war with North Korea over the rogue nation's missile program if it continues to try to hit America, Sen.
Meanwhile the United States, through the State Department, is taking a softer approach to North Korea, telling the cloaked country and it's leader that the U.S.is not the enemy.More news: Chris Sale 'mapped out' to pitch in all three remaining Yankees series
More news: Quotes From Trump's Calls With Mexico & Australia You'll Wish Weren't Real
More news: Amazon getting ready to launch in Australia
But he emphasised that the USA is still relying on China to pressure North Korea - a tactic many analysts say will not work.
North Korea has so far conducted a total of five nuclear tests, in 2006, 2009, 2013 and twice in 2016, and numerous missile test-launches.
Duterte a year ago called then US President Barack Obama a "son of a whore" for criticising the drug war.
The ICBM community, including the Department of Defense, the Department of Energy, and U.S. Strategic Command uses data collected from test launches for continuing force development evaluation.
The U.S. and its allies flew bombers over the Korean Peninsula in a show of strength on Sunday, after the second ICBM test.
On Saturday, Trump tweeted that he was "very disappointed in China" for not doing enough to intervene with North Korea.
"At the same time, we also call on all parties not to take any actions that will lead to an escalation in tensions". It can help defuse the situation by choking off its energy trade with North Korea. Every North Korean missile launch brings confrontation closer.