- North Korea is still working on its ballistic missile program, say US officialsNBCNews.com
- US Think Tank Says at Least 13 Undeclared Missile Bases Identified in North KoreaU.S. News & World Report
- Commercial Satellites Reveal North Korean Missile BaseNPR
- Undeclared North Korea: Missile Operating Bases Revealed – Beyond ParallelBeyond Parallel – Center for Strategic and International Studies
- In North Korea, Missile Bases Suggest a Great DeceptionNew York Times