The use of the term is a declaration that the USA reserves the right to go it's own way, unhindered by worldwide accords, and signals a break with Obama's emphasis on multilateral approach to global relations.
Addressing several hundred air force personnel after reviewing some of America's most high-tech fighters jets and bombers, Trump warned that Pyongyang had "once again shown its utter contempt for its neighbors and for the entire world community".
Diplomacy on the North Korean nuclear standoff has been stalled for years.
US President Donald Trump has scheduled talks with leaders of Japan and South Korea to address the crisis. Only now, the threat is heightened.
Up until recently, USA assurances to Japan and South Korea have been enough to keep both Seoul and Tokyo closely aligned with Washington in their responses to the North Korean threat. The remarks also came after H R McMaster, the US' National Security Adviser, reaffirmed that the Trump administration has military options in place for dealing with North Korea.
On the other hand, the US and South Korea have announced diminishing willingness to talk to North Korea as it continues its provocative missile launches and nuclear tests. But the North has ignored countless worldwide reproaches previously. The U.N. Security Council met on Friday afternoon to discuss the North Korean launch, as requested by the United States and Japan.
"For those who have said, and been commenting about a lack of a military option, there is a military option", McMaster said. "Now, it's not what we would prefer to do".
The United Nations reacted strongly after North Korea tested a weaponanalysts say has the explosive power of 250 kilotons of TNT, passing the new sanctions on September 11. "We must make North Korea understand this", Abe said.
After addressing the General Assembly Tuesday morning, Trump will meet with senior United Nations officials and the Emir of Qatar, a key regional ally which he has accused of backing terrorism in recent months.
Trump's United Nations envoy called North Korea "reckless".
U.N. Ambassador Nikki Haley told reporters on Friday that North Korea has been "strangled" by sanctions and that, while it is important to pursue diplomatic options, military options remain squarely on the table if sanctions are not effective. As president-elect, he called it, quote, "just a club for people to get together, talk and have a good time". After the new sanctions were imposed Monday, North Korea called for the Security Council to be broken up, accusing it of being a "tool of evil" working for the United States. "So, having said that, I have no problem with kicking it to (Defense Secretary James) Mattis because I think he has plenty of options".