article_snippet: the graphic creators, Hans Kristensen and Robert Norris, from the Federation of American Scientists say that in the past, host countries have learned of foreign nuclear weapons on host countries soil from the Nuclear Notebook.
article_snippet: The left image shows a pock-marked landscape which is the the result of decades of nuclear weapons testing in the Nevada desert. 
article_snippet: Pictured on the right is a mushroom cloud rising above the Nevada desert in 1953 . '
article_snippet: For instance, Japan - which was the target of two atomic bomb attacks and has a law against nuclear weapons on its territory - learned from the Nuclear Notebook that there were US nuclear weapons on Chichi Jima and Iwo Jima,' the authors write. '
article_snippet: [It also learned] about an enormous and varied US nuclear arsenal on Okinawa, US nuclear bombs stored on the mainland at Misawa and Itazuki air bases, and nuclear-armed US Navy ships stationed in Sasebo and Yokosuka.'
article_snippet: A self-propelled suface to air missile during a drill shown in a North Korean drill .
article_snippet: And cutting-edge European companies could be unwittingly contributing to Pyongyang's suspect nuclear program with cutting-edge European companies equipment diverted to the isolated country via China, US researchers said.
article_snippet: its would also make significant advances in miniaturisation technology enabling its to mount warheads on intermediate-range ballistic missiles.
article_snippet: Since the U.S unleashed the first nuclear bombs on Hiroshima and Nagasaki back in 1945 there have been a staggering 2056 nuclear tests recorded worldwide.
article_snippet: It took almost a year until the next substantial tests took place but by the mid-50s and 60s, nuclear experiments were being recorded across the globe on almost a monthly basis.