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Hiatt, Dean at the Harvard School of Public Health, encloses the statement presented to Pope John Paul II at the recent meeting of Presidents of the National Scientific Academies. Carlos Chagas and Viki Weisskopf ask that Nirenberg sign the statement, "Declaration of Prevention on Nuclear War," as a member of the Pontifical Academy of Sciences. Hiatt informs Nirenberg that there was virtual unanimity among the scientists regarding the statement.