Websites Discussing How Information about the Holocaust Traveled

What did they know?  American Jews and the Shoah
http://www.holocaust-trc.org/Whatdidtheyknow.htm

The Simon Wiesenthal Center's 36 Questions About the Holocaust (19-29)
http://www.jewishvirtuallibrary.org/jsource/Holocaust/36quest2.html

What the Allies Knew
http://www.pbs.org/newshour/bb/europe/november96/holocaust_11-20.html