North Korea accused the Obama administration of hostility and is vowing to bolster its nuclear arsenal. Pyongyang's Foreign Ministry said Friday that the regime will follow through on plans to "further strengthen our nuclear deterrent." The ministry cites what it calls the "hostile policy" of President Barack Obama's administration, mentioning its push to have the United Nations censure North Korea following its April 5 rocket launch. The statement comes as Obama's envoy for North Korea is in the region for talks with his Asian counterparts on how to get Pyongyang back to the nuclear negotiating table. Pyongyang quit six-nation disarmament talks last month and has been threatening to carry out nuclear and long-range missile tests.