I thought the Altgens photo of the JFK Limo approaching the Triple Underpass displayed damage to the windshield being present at that time?
Some people claim that, but if you look closely at a good copy of the photo, the "spiral nebula" Fetzer, et al, presume to be a hole stops abruptly at the edge of the rear-view mirror. That is, the mirror is between the "nebula" and the camera, and must therefore be ahead of it. That couldn't be true if the "nebula" was on or in the windshield.