My great grandfather (Rudolph Korwin Piotrowski) was one of the two founders of the Polish Society in San Francisco, in 1863. He had many adventures in life. Today the Polish Club continues to represent the Polish population of the Bay Area. I have met many survivors of concentration camps at the club. Each has a unique and terrifying story. Here is just one:

LIBERATION OF DACHAU CONCENTRATION CAMP

http://capolonia.com/Dachau_Survivor/