Oppenheimer, when he went into Truman's office with Dean Acheson, said to the latter, wringing his hands: "I have blood on my hands".
Truman later said to Acheson: "Never bring that fucking cretin in here agian. He didn't drop the bomb. I did. That kind of weepiness makes me sick"
~ Source: Jean-Jacques Salomon Science et Politique (1970) - History in Quotations, page 882