DefenceTalkThe atomic bombings of Hiroshima and Nagasaki capped six years of top-secret work by scientists from Europe and North America. Here is an overview of how that process unfolded. Einstein warning In 1939, Albert Einstein signs a letter warning US president Franklin D. Roosevelt of the destructive potential of nuclear fission, which was discovered by […]https://www.defencetalk.com/from-manhattan-to-hiroshima-the-race-for-the-atom-bomb-76123/