“A report published by South Korea’s Defense Ministry on December 6 estimates that North Korea has further increased its focus on network and electronic warfare over the last year, doubling the size of its ‘cyber forces’ to 6,000 soldiers. The report also warned that North Korea has made significant advances in its nuclear weapons technology and could now have the capability of threatening the mainland of the United States with a nuclear strike.”
Source:South Korea says North Korea doubled size of its “cyber forces,” can nuke US | Ars Technica