The foreign policy of the DPRK, of which its nuclear weapons and ballistic missile programs are a part, is aimed at combatting the existential threat to the DPRK governing elite.First, let us consider some of the physical aspects of DPRK test #2.A yield up to 20 kT is clearly a "success" and indicates the verification of one design of an implosion system (discounting the possibility of a gun-type