Fair comment Hanno. I have only known the Sherman as "After Hitler" and not "America first", but I would be very interested to hear more. Here is a link with some picture taken in 1946, shortly after the museum opened. There are a few pics of the Sherman in question, but I can't make out a nickname.... Also pictured is the other 7AD Sherman "Cookie", which as most of you know was sold a few years ago and ended up as a monument for the Canadians in Ortona.
http://www.gahetna.nl/collectie/afbeeldingen/fotocollectie/zoeken/weergave/grid/tstart/0/q/zoekterm/overloon/q/commentaar/1
The event itself looks excellent, by the way.
Alex