One of 20 undeclared ballistic missile operating bases in North Korea serves as a missile headquarters, according to a report by the Center for Strategic and International Studies (CSIS) published on Monday.
"The Sino-ri missile operating base and the Nodong missiles deployed at this location fit into North Korea's presumed nuclear military strategy by providing an operational-level nuclear or conventional first strike capability," the report said.
The discovery of an undeclared missile headquarters comes three days after U.S. President Donald Trump announced on Friday that he "looks forward" to another summit to discuss denuclearization with North Korean leader Kim Jong Un in late February.