[Wallaby]

As one who grew up with "who" and "whom," I react sharply to the latter-day error of substituting "that." Thus I was struck by phrasing in the "memo" of August 1, 1972, "... qualified Vietnam pilots that have rotated...."

I don't believe anyone would have written this in 1972. It would have been, "...pilots who have rotated...."

Maybe not in 1972, but how about these lines from Shakespeare?

HAMLET: My fate cries out,
And makes each petty artery in this body
As hardy as the Nemean lion's nerve.
Still am I called. Unhand me, gentlemen.
By heaven, I'll make a ghost of him that lets me!
Hamlet, Act I, Scene iv, lines 81-5.

Good to cross paths with you, old friend.

[T'wit]

Shakespeare was called a "bard," wasn't he? Bards have poetic licenses.

Cheers back atcha!