/begin my translation N. Korean Underground Tunnels, Impregnable Fortresses against Nuclear Attack Eludes U.S. spy satellites by painting radar-absorbing materials(on the entrance)Enough food to last for 3 years -- even equipped with oxygen generators We set up the new section called 'N. Korean File' to provide you with vivid picture of N. Korean society. (Articles in) this section would be based on internal documents from N. Korea or testimony from N. Korean defectors. As its first article, we investigate underground tunnels in N. Korea, based on content from monthly magazine 'N. Korea.' It is first revealed in S. Korea that N. Korea kept U.S. spy satellites from tracking...