During my Tourist trip to Pyongyang I went into the underground tunnels of Pyongyang they are abount 300 to 1000 feet underground . They are deep to avoid the American bombs from conventional and nuclear weapons .North Korea has about 300 to 500 miles of underground tunnels in hard rock . They have been digging tunnels for sixty years preparing for war since the Korean war of 1952 .For them they have always lived in fear of bombing . About thirty percent of the population died in korean war from bombing. Bombing houses kills women and children . It is morally wrong for military to bomb a house because it results in death of women and children and babies . The DPRK leaders will be deep underground beneath thousands of feet of granite with hundreds of miles of granite tunnels to hide in . Digging them out will not be easy .Especially when they have plutonium and uranium nuclear weapons . The bunker busters do fairly well if GPS is working but do not forget the effect of HEU weapons on EMP and GPS. The laser guidance bombs may not work well until all the fallout dies down . North Korean underground is a rocky fortress made of granite . Its a granite ant hill with ants armed with nukes. Encourage all countries to ban targeting houses and cities with bombs and nuclear weapons. Bombing houses kills women and children. Love your neighbor as your self .Do unto others as you would have them do unto you. Do not target their homes and ask them not to target yours.The videos are from a tour of Pyong yang subway . It is the first American families that ever toured Pyongyang . We do not hate North Koreans . Love all people .Love not hate is the answer.