Warsaw, Nazi-occupied Poland, 1940. The signs read, "Typhus area. Passage permitted only while traveling." (Hugo Jaeger—Time & Life Pictures/Getty Images)

Click here to see the full collection at ... more 
Warsaw, Nazi-occupied Poland, 1940. The signs read, "Typhus area. Passage permitted only while traveling." (Hugo Jaeger—Time & Life Pictures/Getty Images)

Click here to see the full collection at LIFE.com less 
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Fri, Jan 18, 2013 1:00 PM EST