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The stainless steel body of Tesla's Cybertruck is reportedly leading to issues with gaps in between the panels
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
The glass isn't bullet proof, although it's toughened. The body panels are supposed to be bullet proof (obviously only up to a certain point, as nothing is ever bullet proof against everything).
I think the bullet proof nature of the panels is more of a happy accident with the stainless being used just being very tough to begin with.