North Korea now has 20 nuclear warheads at most, a leading international security think tank said Monday, at a time when concerns are growing in the Asia-Pacific region that Pyongyang could conduct a nuclear test anytime soon. The Stockholm International Peace Research Institute gave the estimates for this year for “the number of actual assembled warheads North Korea possesses.” Figures released in previous years referred to the number of warheads that it could build… – Kyodo News Photo: KCNS