Which excerpt provides evidence that the united states knew about the nazi concentration camps

The depressing tale of the St.Louis is a case in point. Sixty years ago, its human cargo --- nearly 1,000 Jews --- was turned back to Nazi Germany.

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

this is a good question! i'll do some research and come back when i have the answer!