We knew the world would never be the same again. A few people laughed, a few people cried. Most were silent. I remembered a line from the holy book of Hinduism, the Bhagavad Gita | Vishnu is trying to persuade the Prince that he must do his duty, and in order to impress him, he takes on his many-armed appearance and says: “I am Death, the great destroyer of worlds ...” These words were spoken by Robert Oppenheimer after how nuclear bombs wiped out Hiroshima and Nagasaki. Two bombs, named "Kid" and "Fat Man", were the result of a long work of the "Manhattan Project". A group of the best scientists in the world, led by Robert Oppenheimer, worked for several years to create the most powerful and dangerous weapon in the world. Articles devoted to working as part of the Manhattan Project made up the book that you are holding in your hands.