seoul north korea leader kim jong un vow develop nuclear weapons tuesday personally decorate scientists officials contribute development pyongyang advance intercontinental ballistic missile hwasong-15 hwasong-15 test-launched nov. 29 largely perceive analysts government officials range reach mainland unite state however experts believe north korea still technical point need improve fully complete goal develop nuclear-tipped missile hit entirety unite state kim jong un say tuesday scientists workers would continue manufacture late weapons equipment bolster nuclear force quality quantity north central news agency report wednesday north korean leader speak close rare two-day munition conference celebrate hwasong-15 kim also say north korea develop manufacture diverse weapons kim personally award medals field defense science faithfully perfectly carry party plan build strategic nuclear force successfully test-fired icbm hwasong-15 thus demonstrate dignity might powerful state world kcna say without name recipients give several medals include order kim il sing order kim jong il high order dprk acronym north korea official name democratic people republic korea addition medals kcna say scientists officials give watch engrave name kim il sing kim jong il north korean leader grandfather father solemnly declare development new strategic weapon systems include a-bomb h-bomb icbm hwasong-15 indigenous efforts technology realization great cause complete state nuclear force serve great historic victory party people country north korea state media add cite kim isolate state previously say succeed develop atom bomb hydrogen bomb carry six nuclear test 2006 late september year although outside entity able confirm north announcements north korea 's kim jong un fete rocket scientists promise weapons