North Korean officials have reportedly begun to crack down on music that is banned in the world's most closed society.  According to a report in South Korea's Daily NK, North Korean dictator Kin Jong-un has ordered officers to search citizens' homes for music that is considered a threat to the young leader's regime.  "If even one song from the banned list is discovered [in a collection], they incinerate the whole thing," a source told the Daily NK.  Censorship has a long history in North Korea, but some of the newly added songs on the banned list have struck a chord with North Koreans, according to the report.