1.
First we attacked the Russian soldiers with our gases, and then when we saw the poor fellows lying there, dying slowly, we tried to make breathing easier for them by using our own life-saving devices on them.
Otto Hahn
2.
As a result of continuous work with these highly toxic substances, our minds were so numbed that we no longer had any scruples about the whole thing. Anyway, our enemies had by now adopted our methods and as they became increasingly successful in this mode of warfare we were no longer exclusively the aggressors, but found ourselves more and more at the receiving end.
Otto Hahn