if you look at the original Zapruder film closely just after the car goes past the sign and comes into frame that second windshield is visible and it is also a stretch, note the space between the front and rear doors, it is in both videos if you go frame by frame of the original Zapruder film.
Some people are very gullible and just saying crap like that on the idiotnet will make them think what that guy said is true. It's not, any of what was said in that video, it was a hardtop convertible stretch made specifically for the president. then customized even more to bullet proof the car. Adding weight to the roof, hence the reason for the support behind the driver for that heavier than normal top. There is no glass in that second windshield as you call it.
https://youtu.be/kq1PbgeBoQ4Stop believing everything you see on the idiotnet. most of it is just BS !
Steve
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Technology is great when it works,
and one big pain in the ass when it doesn't

Detroit iron rules all the rest are just toys.
[This message has been edited by 84fiero123 (edited 07-14-2016).]