Fun fact: a similar type of laminated bulletproof glass was used to protect the pilots of WWII fighter planes from the front. If you've ever wondered why, say, a Spitfire has that small window in the very front of the cockpit that seems to have a blueish tint, that's the bulletproof glass. That, plus a steel plate in the pilot's seat back and a thin firewall behind the engine, would often be the only actual armor found on a fighter plane.