When Germany invaded Russia in the summer of 1941, he became a full-time war correspondent for the Associated Negro Press and in 1944 he became half of the two-person Associated Press team in Moscow. In January 1944, he was part of the delegation of Western correspondents who visited the graves in Katyn forest at the invitation of the Soviets. However, he did not publish an article about the trip to Katyn. In his memoirs he wrote that he had had doubts about the Soviet version that the Germans had been the perpetrators.