https://www.nytimes.com/2017/12/17/us/politics/tillerson-north-korea-china.html
This is a breathtaking public acknowledgement by a senior US Government official, notwithstanding OCT 2017 reportage that:
North Korean hackers were reportedly able to obtain a copy of the U.S. military’s OPLAN 5015. This is a detailed outline for what has been described as a “decapitation strike,” that would, based on available reports, seek to swiftly neutralize North Korea’s top civilian and military leadership, as well as eliminate the threat of the country’s weapons of mass destruction – including both nuclear and chemical stockpiles – and ballistic missiles.