Fogged windshield questions

That white fog is in the glass. Most of the time I have seen it is in conjunction with bending the windshield while trying to get it out of a car. I think it is actually caused by shear (tearing) of the adhesive layer of the windshield.

The windshield is actually two panels of glass that are laminated together. This is done to make the windshield more resistant to impacts. The bonding adhesive also tends to retain broken glass which is viewed as a safety feature.