Attachment D Under Secretary of the Navy memorandum to the Secretary of Defense, April 24, 1950 MEMORANDUM FOR THE SECRETARY OF DEFENSE Subj: Recommendation that the Armed Services conduct experiments on human subjects to determine effects of radiation exposure Ref: (a) Memorandum to Secretary of the Navy from Director of Medical Services of 3 April 1950 1. The Panel on Atomic Warfare of the Research and Development Board has agreed that accurate experimental data on the biological effects of known levels of radiation exposure in human subjects is essential for complete knowledge of the problems involved. 2. It is believed that the procedures proposed by the Chairman of the Subcommittee of the NEPA Medical Advisory Committee are sound from a research point of view. It is further believed that the proposal to use long-term prisoners, with the safeguards of exposure levels and the insurance of a true volunteer status, meets the requirements of accepted American standards for the use of human subjects for research purposes. Prepared by: Rear Admiral F. C. Greaves (MC) USN Assistant Chief of Bureau for Research & Medical Military Specialties, BuMed Potomac Annex, Bldg. 4, Rm. 34 Ext. 5110 18 Apr 1950