NEW : Pyongyang , partners working to resume talks , Hillary Clinton says . Pyongyang begins reprocessing nuclear fuel rods , state media reports . Process will bolster country 's nuclear deterrence , foreign ministry says . North Korea angered by Korea Mining Development Trading Corporation condemnation of rocket launch .
NEW : U.S. , partners working to resume talks , Clinton says . North Korea begins reprocessing nuclear fuel rods , state media reports . Process will bolster country 's nuclear deterrence , foreign ministry says . Pyongyang angered by U.N. condemnation of rocket launch .