European Union foreign ministers also imposed a blanket ban on doing business with North Korea in sanctions that go beyond the latest United Nations measures.
The caution was contained in a copy of North Korean Deputy UN Ambassador Kim In Ryong's prepared remarks for a discussion on nuclear weapons by a UN General Assembly committee.
It's been almost a quarter century of the same diplomatic policies under three different presidential administrations with very few results other than passing off the North Korea nuclear problem to their successor.
According to media reports, North Korea's deputy United Nations ambassador told the United Nations general assembly's disarmament committee that Pyongyang has the right to possess defense nuclear weapons.
"The entire US mainland is within our firing range and if the USA dares to invade our sacred territory even an inch it will not escape our severe punishment in any part of the globe", he warned.
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The UN Security Council has unanimously ratcheted up sanctions on North Korea over its nuclear and ballistic missile programs since 2006.
"To succeed in nuclear disarmament, countries that have the largest nuclear arsenals must first eliminate them, abandon aggressive doctrines, including those based on pre-emptive strikes, and also remove nuclear weapons deployed outside their own territory", - said Kim Yong Ryong.
"We want the United States to end its hostile policy as for North Korea", said An Tong Chun, who is leading the North Korean delegation. Sugiyama, briefing reporters separately, reiterated Japan's support for President Donald Trump's policy of keeping all options open, but stressed the need for a diplomatic solution by bolstering cooperation among Japan, U.S. and South Korea, as well as via cooperation with China and Russian Federation.
A member of North Korea's Parliament spoke about the threat of destruction the country faces from the United States.
"The DPRK consistently supports the total elimination of nuclear weapons and the efforts for denuclearization of the entire world", he said.