1. The experiment would have to be _necessary_, particularly necessary in the interests of aviation and thus essential to the fatherland’s war effort. This condition is obviously fulfilled. This is confirmed above all by the statement of the witness Dr. Hippke who stated that it was Dr. Ruff’s duty to work on the research tasks assigned to him by the Medical Inspectorate of the Luftwaffe and to submit reports on them to the Medical Inspectorate. The experiments carried out by Ruff were necessary, for “high-altitude experiments in particular have been undertaken intensively in America, too, because the question of pressure drop [Drucksturz] and the cabin development is of particular importance.” (_Ruff 23, Ruff Ex. 22._) Dr. Hippke developed this point of view not only during the trial but stated it very clearly in his letter to Himmler, dated as early as 8 October 1942 (_NO-289, Pros. Ex. 72_), where he writes: “These-experiments represent a very valuable and important supplement. The fact that such an extreme deficiency of oxygen can be endured at all for some time is very encouraging for further research.” Dr. Hippke’s opinion about the necessity of the high-altitude experiments is therefore extremely important because Hippke was the highest official expert in that field in Germany at that time. But most of all, the absolute necessity of Ruff’s experiments is acknowledged by all experts who testified in this trial in connection with these problems. I recall, for example, the statements of the witness Dr. Scheiber that “at a later judgment of Dr. Ruff’s scientific work, his name will be remembered together with the names of all of those well-known scientific research workers who, by personal, devoted, and heroic effort, rendered immeasurable service to the advance of science and therewith to the welfare of humanity.” Professor Dr. Strughold expresses himself in a similar way in his affidavit. He was chief of a German institute for aviation medicine for several years and writes concerning Dr. Ruff that “he (Ruff) can be considered as a man who surpasses by far many academically proficient and recognized scientists as far as scientific experience and scientific success is concerned.” Of particular importance, however, seems to be the opinion of Dr. Grauer, who is at present in America as a research worker and experimenter in matters of aviation medicine. * * * * * According to the opinion of the Air Force General, Adolf Galland, and the statements of all the other experts, it is an established fact that the Dachau experiments of Dr. Ruff and Dr. Romberg were absolutely necessary.