I refer you to post 510 (Orac's question) and cpants reply at post 517
To ORAC
cpants makes proper reference to RC-135 (62-4127). Rivet Amber was not a player in his 2008 disclosure to Congress.
I understand Rivet Amber was the name given to a single aircraft which was lost in 1969. Plenty of learned stuff
readily available. LFH