- South Korea summons Russian ambassador as tensions rise with North KoreaThe Associated Press
- North Korea appears to construct walls near DMZ, satellite images revealCBS News
- North Korea Has Lost ‘Many’ Troops to Mines in DMZ, South SaysThe New York Times
- North Korea Satellite Images Show Troops Building Border ‘Wall’Newsweek
- How Did North Korean Soldiers Wander Across the World’s Most Heavily Guarded Border?Military.com