If you look at the subject in one of the CBS pdfs ("SUBJECT: CYA") the space between the letters Y and A is not reduced i.e. it seems that kerning is NOT used. To see what kerning does to the string "CYA", open MS Word and type in the letters and enable kerning from Format/Font/Character Spacing. With MS Word the space between Y and A is visibly reduced when kerning is enabled. The result also differs from the CBS pdf file where kerning is NOT visible in the string "CYA".
"Look at the fake August 18, 2003 memo (click to enlage):
"Check out the word "my" in line two, or "any" in line four. That's kerning. It was done on a word processor. As, in fact, should be apparent to anyone who looks at the document. Compare it to a genuine, typewriter-produced memo, as we did yesterday. The difference is obvious.
"Kos also never addresses any of the substantive issues: the absurdity, on its face, of writing a memo whose subject heading is "CYA;" the memos' inconsistency with various military usages of the early 1970's; and, most of all, the anachronism in the August 18, 1973 memo, where Killian allegedly writes: "Staudt has obviously pressured Hodges more about Bush." Brigadier General "Buck" Staudt retired in 1972.
I am smart enough to recognize the evidence of "kerning" is needed but not smart or able enough to go through the memos and look for them.