“The offices of the Government, the military, industrial, war-making establishments in Berlin are a fair target. Injuries to civilians are inevitable. But up to date half Berlin has been destroyed, area by area, the residential and the industrial portions alike. . . . It is said that 74,000 persons have been killed and that 3,000,000 are already homeless. The policy is obliteration, openly acknowledged. That is not a justifiable act of war.”