Created by a collaboration between the US National Archives and Footnote. Well-organised and presented. With the volume of new digital history material being made available, it's hard to keep up!
I don't usually add blogs however this one has so much quality historical material on real life in the USSR that I thought some people might find it useful. Might help to dispel some of the myths about life in the big bad evil Soviet Empire.
Declassified British intelligence files describe how the men were part of Nazi sabotage teams sent to the U.S. in June 1942 to undermine the American war effort