Action: What would North Korea be fear of after having nuclear strike capability?

The DPRK successfully conducted a test of hydrogen bomb meant for intercontinental ballistic missile last Sunday, which magnificently aggravated global tensions. South Korea's intelligence department said North Korea is preparing to launch another intercontinental ballistic missile. Why is North Korea's nuclear bomb and missile technology so soaring? What would North Korea be fear of after having nuclear strike capability? Peter Cai, a special commentator of SBS, made a comment on the topic in the talkback. And many callers shared their opinions in the program.

A missile lauched by North Korea Source: AAP