North Korean provocations have long been seen as merely harsh rhetoric and empty threats, but in recent weeks tensions between North and South Korea have reached an all-time high. Following North Korea's underground nuclear test on February 12, the United Nations said it would impose tougher sanctions on the country, which in turn led to North Korea threatening that it could make a pre-emptive nuclear strike on the US. Nevertheless, the UN sanctions came into force on March 7.
展开▼
