Japan's atomic bomb was a dud, wartime papers reveal
Straits Times, Singapore - 6 March
TOKYO - For nearly six decades, historians have been unable to solve one of the mysteries of Japan's World War II A-bomb project: How close were Japanese scientists to building the atomic bomb before the US air raid stopped them?
...Historians say not only had Japan's scientists underestimated how much of the rare isotope uranium-235 they would need for the bomb, they misunderstood the mechanics of an atomic explosion.
