In a message dated 12/9/2005 12:01:54 PM Eastern Standard Time, some misguided, credulous person, possibly a CIA mole (or mohel?) writes:
From looking at the original rendering of the building it looks to me as though the gun-slits came much later.
Sweethearts, that ain't the "original rendering" of the building. Among other things it bears a seven-digit phone number (which took place well after the building was constructed). It's a letterhead, subject to all sorts of foolishness (since not designed by Registered Architect, among other things). Not sure why somebody put the windows, but they aren't there now, and weren't there originally.
Find very early photograph 2 pages down in the following document, clearly showing present "slit window" conditions:
Sincerely yours, Never Really Liked Cass Gilbert, Nothwithstanding