![Jan Karski, underground courier for the Polish government-in-exile, informed the West in the fall of 1942 about Nazi atrocities against ... [LCID: 90533]](https://encyclopedia.ushmm.org/images/large/eb6b5b21-90ee-40c1-8741-35d30dafb0e3.jpg)
Jan Karski, underground courier for the Polish government-in-exile, informed the West in the fall of 1942 about Nazi atrocities against Jews taking place in Poland. Washington, DC, United States, 1943.
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