the official reports may actually have come from other couriers. Reception and significance In 1942 Karski visited London, where he met with Polish and British officials, and other prominent people. A year later he visited the United States. Although information regarding the Holocaust constituted only a small part of the information he collected and delivered, it became one of the most influential parts of his reports. The Polish government used Karski's reports to appeal to the Western Allies to interfere with the German atrocities against the Polish Jews, though by 1943 the appeals had not produced any results, as most Western leaders were not interested in or did not believe such revelations, and the Polish government officials themselves saw Jewish public opinion as unfavorable towards the Polish state. The Western Allies' response was indeed lackluster. Nechma Tec wrote that "Karski's reports about the Jewish plight and the messages from the Jewish leaders that inevitably pleaded for help fell on deaf ears". Until the revelations late in the war, many Western politicians, and even some Jewish leaders, remained skeptical of Karski's reports, which were called "atrocity propaganda". Similarly, most newspapers treated Karski's revelations as "a minor story". In 2010 Claude Lanzmann, who interviewed Karski in 1978 and in 1985 used part of that interview in his film Shoah, released a documentary focused on Karski, titled The Karski Report . See also Raczyński's Note Witold's Report The Mass Extermination of Jews in German Occupied Poland Further reading References External links Karski's raports, scanned, on the pages of the Museum of Polish History Report on the attacks on the Jewish ghetto in Warsaw scanned and transcript on "The National Archives (UK)" The Holocaust in Poland Holocaust historical documents Government reports 1940 in Poland 1940 documents