New pictures of North Korean leader Kim Jong Un touring what state media said is a uranium enrichment facility have given an extremely rare glimpse inside the isolated nation’s closely guarded nuclear weapons program.

Kim’s daughter also appeared at this event, her first appearance in 80 days. Interestingly, Kim’s sister, Kim Yo Jong, was reportedly escorting her niece, showing deference. There was a time when South Korea was touting Kim Yo Jong herself as successor, but that possibility has now all but vanished.