Kim Jong Un appears to have kicked North Korea’s pan­dem­ic pre­ven­tion plan into over­drive, fur­ther tight­en­ing the country’s near­ly impas­si­ble bor­ders, cut­ting off near­ly all trade with Chi­na and even alleged­ly exe­cut­ing a cus­toms offi­cials for fail­ing to han­dle import­ed goods appropriately.