A cube of uranium is displayed at the National Museum of Nuclear Science and History in New Mexico Susan Montoya Bryan/AP/Shutterstock
An investigation of illegal nuclear material trafficking could be made easier by using a method to prove the source of the uranium cubes that were believed to have been saved from the Nazi atomic blast programme.
During the second world conflict, the Nazis had two nuclear weapons programs. Jon Schwantes, Pacific Northwest, stated that 1200 cubes were made of uranium, of which 600 made it to the USA in the final stages of war.