Heisenberg said in 1939 that the physicists at the (second) meeting said that "in principle atomic bombs could be made... it would take years... not before five." He said, "I didn't report it to the Führer until two weeks later and very casually because I did not want the Führer to get so interested that he would order great efforts immediately to make the atomic bomb. Speer felt it was better that the whole thing should be dropped and the Führer also reacted that way." He said they presented the matter in this way for their personal safety as the probability (of success) was nearly zero, but if many thousands (of) people developed nothing, that could have "extremely disagreeable consequences for us." So we turned the slogan around to "make use of warfare for physics" not "make use of physics for warfare." Erhard Milch asked how long America would take and was told 1944 though the group "between ourselves" thought it would take longer, three or four years.