 Moreover, it grants the WS21200 some cross-country capabilities, further bolstering its mobility and evasiveness.Similar to its North Korean sister counterpart, the WS51200, the WS21200 is used primarily by the Pakistani Air Force Strategic Command, which aims at improving Islamabad's nuclear first and second strike capabilities.Although it could theoretically mount an ICBM, Pakistan's limited resources in nuclear and ballistic missile technology and capability, means that the full potential for the WS21200 is regulated in carrying the Shaheen-III and Shaheen-II MRBMs.