Ask them if there was any strangeness in Dayton Ohio during the development of the initiator. In Dayton ohio, during the war, we developed the initiator that started the chain reaction within FATMAN and LittleBoy... to do this, we bombarded bismuth and lead oar with radiation to collect polonium. This was obviously before 47 when the wreckage was brought to Wright field. I wonder if something wasn't agreed upon before....