North Korean dictator Kim Jong Un has been making more public appearances with the person many believe will succeed him as supreme leader, his teenage daughter Kim Ju Ae. NBC News' Raf Sanchez reports.

Exports of luxury goods to North Korea are banned under U.N. sanctions but such items reportedly make their way into the country via diplomatic pouches.

Under-fire Putin now relying on North Korea even more than China, says expert This launch was witnessed by leader Jong-un, who hailed the vessel as a "standard type of tactical nuclear submarine" and crucial element of North Korea's developing nuclear triad,

North Korea's submarine No. 841 Hero Kim Kun Ok is capable of launching ballistic and cruise missiles armed with nuclear warheads.