The U.S. government set out to secretly take bone samples from dead Japanese infants in the 1950s to examine the effects of radioactive fallout, The Yomiuri Shimbun learned..The document, recently declassified, is a letter written by then U.S. Atomic Energy Commission member Robert A. Dudley to Dr. James K. Scott of Rochester University, who was involved in the U.S. government's nuclear program...The purpose of the bone collection project was concealed. The letter said "the unclassified description of our purpose in obtaining these bones is for Ra [radium] analysis." The letter referred to the Atomic Bomb Casualty Commission--which was looking into the aftereffects of the atomic bombs dropped on Hiroshima and Nagasaki--and the U.S. Embassy, as the places that can help with collection and shipping of the samples. The statements show Japan was a major target of the project, apparently because the group could use the ABCC as a cover for the project. The document cites the need to collect bones from stillborn babies or infants up to 2 years old, as strontium accumulates easily in infants' bones. It states that they needed six to eight samples from Japan.