North Korea not bound by nuclear non-proliferation treaty, UN envoy says

North Korea has insisted that it will not give up its nuclear arsenal, describing its path as "irreversible" and vowing to strengthen its capabilities.

North Korea has insisted that it will not give up its nuclear arsenal, describing its path as "irreversible" and vowing to strengthen its capabilities.

North Korea has insisted that it will not give up its nuclear arsenal, describing its path as "irreversible" and vowing to strengthen its capabilities.