McMaster said North Korea's recent launch demonstrates that it is one of the world's most urgent and unsafe security problems, he added.
By very publicly demonstrating that he not been deterred by Trump's warning of "fire and fury" if he threatened the US or its allies, Kim has challenged the US President's ability to draw clear strategic red lines and to follow through on his warning of a military response to the young autocrat's repeated provocations. "Now, it's not what we would prefer to do", McMaster said. Like his predecessors, Trump has opted for choices somewhere in between: economic sanctions and talk of eventual diplomacy or military action, depending on how North Korea responds. A new set of United Nations sanctions that even Trump declared a "small step", extensive talks and a rhetorical two-step that leaves them where they have been for years.
"China supplies North Korea with most of its oil".
Finally, on Thursday the President will meet with the leaders of Turkey, Afghanistan, and Ukraine, before South Korea and Japan, with which he will discuss the world's "most urgent and risky security problem", North Korea. He called on China and Russian Federation in particular to use their ultimate leverage over North Korea.
"If North Korea continues to walk down this path, it has no bright future".
On the other hand, the USA and South Korea have announced diminishing willingness to talk to North Korea as it continues its provocative missile launches and nuclear tests.
Former top White House aide Steve Bannon told a reporter in August that there are no military solutions for North Korea. He backed up his words with action, ordering a test launch of South Korean missiles into the sea, on a trajectory precisely long enough to have wiped out the launch site for North Korea's ICBM if the weapons were aimed in that direction. South Korean President Moon Jae-in, who ran on a platform of improved relations and expanded dialogue with Pyongyang, said after Thursday's missile launch that "dialogue is impossible in a situation like this".
North Korea said earlier this month it was developing a hydrogen bomb that could carry out an EMP attack. North Korea has launched dozens of missiles under Kim Jong Un's leadership to accelerate a weapons programme created to give it the ability to target the United States with a powerful, nuclear-tipped missile. "China and Russian Federation must indicate their intolerance for these reckless missile launches by taking direct actions of their own", Tillerson said. That launch came less than two weeks after Pyongyang staged its most powerful nuclear test yet.
"Trump's audience will be very aware of his mood swings", said Richard Gowan, a United Nations expert with the European Council on Foreign Relations told Politico.
Promoting an "America First" agenda at the United Nations.