b. Selection From the Argumentation of the Prosecution _EXTRACTS FROM THE CLOSING BRIEF AGAINST DEFENDANTS RUFF, ROMBERG, AND WELTZ_ Early in the war it was deemed necessary to conduct research in the field of high altitudes because of the higher ceilings reached by the Allied fighter planes. This created the problem of availability of human experimental subjects, inasmuch as animal experimentation was considered inadequate. The heights involved were 12,000 meters to over 20,000 meters, hence it goes without saying that such experiments were very dangerous and, as indicated by the evidence, volunteers were not to be had. This difficulty was overcome by the use of concentration camp inmates without their consent. The first indication of this criminal plan appears in a letter from Dr. Sigmund Rascher, a Luftwaffe physician, in a letter to the Reich Leader SS dated 15 May 1941: “For the time being, I have been assigned to the Luftgau Kommando VII, Munich, for a medical selection course. During this course, where research on high-altitude flying plays a prominent part, determined by the somewhat higher ceiling of the English fighter planes, considerable regret was expressed that no experiments on human beings have so far been possible for us because such experiments are very dangerous, _and nobody is volunteering_. I therefore put the serious question: is there any possibility that two or three professional criminals can be made available for these experiments?” [Emphasis supplied.] (_1602, PS, Pros. Ex. 44._) It further appears in this Rascher letter of 15 May 1941 that Rascher had conferred with another Luftwaffe physician and that a tentative agreement had been reached wherein it was determined that the experiments on the concentration camp inmates, in which the experimental subjects were expected to die, would be performed at the “Bodenstaendige Pruefstelle fuer Hoehenforschung der Luftwaffe” at Munich: “The experiments are being performed at the Ground Station for High-Altitude Experiments of the Luftwaffe [Bodenstaendige Pruefstelle fuer Hoehenforschung der Luftwaffe] at Munich. The experiments, in which the experimental subject of course may die, would take place with my collaboration. They are absolutely essential for the research on high-altitude flying and cannot, as it had been tried until now, be carried out on monkeys, because monkeys offer entirely different test conditions. I had an absolutely confidential talk with the representative of the Luftwaffe physician who is conducting these experiments. He also is of the opinion that the problems in question can only be solved by experiments on human beings.” (_1602-PS, Pros. Ex. 44._) * * * * *