Moon Keun-sik, a director at the Korea Defense Forum, on Monday told the Nikkei Asian Review that Pyongyang’s submarine-launched missile program could pose the most dangerous military threat to South Korea and its allies. Satellite images taken this month of a North Korean naval shipyard indicate Pyongyang is pursuing an “aggressive schedule” to build its first operational ballistic missile submarine. Analysts suggest the new vessel will be the first 3,000-ton Sinpo-C class ballistic missile submarine, which is designed to sortie into the Pacific Ocean and remain undetected but able to launch its nuclear-tipped missiles when ordered to do so.