North Korea Refurbishing its First Nuclear Ballistic Missile Submarine Built for Strikes on U.S. Forces

Commercial satellite imagery has revealed North Korea’s first ballistic missile submarine, the unique sole vessel of the Gorae class ship, has been placed in drydock at the Sinpho South Shipyard, fuelling speculation that it may be benefitting from upgrades and refurbishment work.
Refer:    https://tinyurl.com/mppx4afe