I also found it fascinating that both project began around 1960 +/-.
The XB-70 Valkyrie rolled out in May 1964 in a California North American Hanger.
And was flight tested in September of the same year.
Both where beautiful designs and well worth mentioning.

XB-70 Valkyrie
site:
www.labiker.org...
Great find jetsetter.
regards
seekerof

