This image further explains what happens to a projectile that hits the Monolithic Dome. A powerful round is first slowed by the Airform and foam, then is deflected by the hard inner shell and is trapped between the foam and concrete.

This image further explains what happens to a projectile that hits the Monolithic Dome. A powerful round is first slowed by the Airform and foam, then is deflected by the hard inner shell and is trapped between the foam and concrete. (Mike South)