If you do not retract these claims immediately, I will transfer this matter to the attention of legal staff at Lawrence Livermore National Laboratory.Pretty aggressive.
I wonder if the "offending" statement was ever retracted.....
.....And I wonder if it can be show to be accurate and Santer was engaged in a lie when writing the letter you have presented.
Visited the web site, they appear to be primarily a book reviewer. So the legal complaint might have been about a book review. That site BTW is all about American Liberty. Oh the irony.