" In early 1945 Berg did go to Switzerland, as depicted here a bit earlier, to kill Heisenberg if necessary. Sitting in the front row of Heisenberg’s seminar, he determined that the Germans were nowhere near their goal, so he complimented Heisenberg on his speech about field theory and walked him back to his hotel. Moe Berg’s report was distributed to Britain’s prime minister, Winston Churchill, President Franklin D. Roosevelt, and key figures in the team developing the atomic bomb. Roosevelt responded: “Give my regards to the catcher.” Werner "

― Gregory Benford , The Berlin Project