- Pyongyang's insecurity has intensified even more under Kim Jong Un
- The isolated regime has intensified efforts to develop a nuclear strike capability
- The campaign is aimed to shore up Kim's position at home and win bargaining power abroad
Seoul (CNN)Kim Jong Un has been intensifying his efforts to develop a long-range nuclear strike capability since the beginning of 2016. The more vulnerable he feels atop a weakening North Korea, the more he seeks a silver bullet to ensure the regime's long-term survival.