North Korea's Kim vows 'exponential' boost in nuclear forces

SEOUL — Kim Jong Un vowed an “exponential” increase in nuclear military capabilities as state media reported that the North Korean leader visited a new atomic facility. The nuclear-armed country is believed to operate uranium enrichment facilities at three sites: Yongbyon, Kangson and Kusong. Kim on Wednesday went to a “newly inaugurated nuclear materials production factory,” Pyongyang’s state-run Korean Central News Agency (KCNA) said. It reported that Kim no