jong-un. rhee defected in 2014. he gave us insights into north korea's smuggling operations which he describes as being almost unstoppable. >> translator: on the open sea, the yellow sea, there are hundreds of fishing boats both from china and north korea. and all of the smuggling is done by the so-called fishing boats. instead of fishing, they're involved in smuggling. it's very different even for china to stop the boats. >> reporter: according to analysts, kim's regime sells weapons on the black market and uses methamphetamines, fake viagra. >> and kim jong-un sits on top of a network that would makedmam