Amid growing security concerns over Russia's nuclear threat and North Korea's missile ambitions, a nonprofit organization in Japan has built a model nuclear shelter near Tokyo to raise awareness and encourage people to consider digging a doomsday bunker of their own.While not yet open to the public, the underground concrete structure opened on May 10 in a parking lot opposite the Japan Nuclear Shelter Association's office in Tsukuba, Ibaraki Prefecture. It has already hosted about 40 tours by construction professionals, national and local politicians, government agencies and the media.The a…READ FULL ARTICLE