Катынский расстрел
The next month, Carr's relations with the Polish government were further worsened by the storm caused by the discovery of the Katyn massacre committed by the Russian NKVD in 1940. In a leader entitled "Russia and Poland" on 28 April 1943, Carr blasted the Polish government for accusing the Soviets of committing the Katyn massacre and for asking the Red Cross to investigate.