Kodak's Discovery of Atomic Testing

Back in 1945, a physicist employed at Kodak in Rochester, New York discovered that atomic bomb testing had taken place in New Mexico, the details of which weren’t yet public. He found that x-ray films they had delivered to customers were returned back due to black exposed spots, which rendered them unusable. Physicist Julian H. Webb discovered that the problem originated from the strawboard which was used to package the film which contained traces of Cerium-141. The straw was sourced from milling plants in Indiana and Iowa. Cerium-141 is one of the fission products of an atom bomb.