A lot of the advancements that made the Manhattan project were published by the Germans. On hearing about Hiroshima, Otto Hahn was "'shattered,' and went on to

A lot of the advancements that made the Manhattan project were published by the Germans. On hearing about Hiroshima, Otto Hahn was "'shattered,' and went on to say that he felt 'personally responsible for the deaths of hundreds of thousands of people,' believing that his discovery had made the bomb possible." (https://www.washingtonpost.com/archive/opinions/1992/03/01/the-secret-nazi-atomic-tapes/42a8222d-5ec0-4d66-b335-a71064b4e290 https://www.washingtonpost.com/archive/opinions/1992/03/01/t...)