Agreed that this is low probability. But it did strike me that the Nazi brass were most interested in such a crash program, at one point declaring that it shoul

Agreed that this is low probability. But it did strike me that the Nazi brass were most interested in such a crash program, at one point declaring that it should be given top priority. What dissuaded them were the apparent failures of early efforts and lack of confidence of the scientists themselves — the scientists got hung up on use of heavy water as a neutron moderator, among other suboptimal practical decisions.