-Distrust was evident at Potsdam as Churchill and Truman were upset that Stalin had not kept the promise that he had made at Yalta for free elections to be held in Eastern Europe.
-For this reason, Truman not wish to tell Stalin about the American success in testing the atomic bomb.
-The next conference held after Yalta, Potsdam, was following the death of Roosevelt, and a hardening of the US attitude towards the USSR by President Truman.
-Truman felt that Stalin had gone beyond the agreement that had been made at Yalta (especially in Poland). Stalin wanted Poland to be governed