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.

Photos of North Korea's uranium enrichment facility may show an undeclared site for building nuclear bombs just outside of its capital, analysts said.

SEOUL, South Korea -- North Korea offered a rare glimpse into a secretive facility to produce weapons-grade uranium as state media reported Friday that leader Kim Jong Un visited the area and called for stronger efforts to "exponentially" increase its number of nuclear weapons.