Since August 6, 1945, Hiroshima's mission has been to educate the world about the cruelty and disaster caused by the use of atomic weapons. Hiroshima has been so successful in their mission that, after almost 70 years since the destruction, atomic weapons have never been used during war. As Nobel laureate and economist, Thomas Schelling, pointed out in his acceptance speech, Hiroshima's legacy has prevented atomic weapons from being used in the world.
However, the surge of terrorist attacks has forced us to change this notion. Human beings may again suffer gigantic destruction and its lingering consequences. Graham Allison, who analyzed the Cuban missile crisis in his book, warned the world about the upcoming threat of nuclear terrorism. Allison is not alone; George P. Schultz, William J. Perry, Henry A. Kissinger and Sam Nunn have also earnestly insisted that the world needs to be free from nuclear weapons facing emerging challenges posed by state and non-state actors.