In 1942, Karski, a Polish-born diplomat, traveled to the United Kingdom to report on what came to be called the Holocaust. The next year, he embarked on a mission to the United States to brief President Franklin D. Roosevelt and other dignitaries on the horrors that he had witnessed.
1942年，波兰出生的外交官卡尔斯基前往英国报告后来被称之为大屠杀的暴行。第二年他又踏上了向美国总统富兰克林·D·罗斯福及其他政要汇报他亲眼目睹的恐怖行径的旅程。他的英美之旅无一例外地遭遇了怀疑和冷漠。事实上，直到战争末期国际社会才为阻止屠杀采取了行动。