The recent incident in which someone took shots at the White House shows why the government installed the same film as ours on all federal buildings after 9/11.
In addition, some buildings –like the white house –received ballistic glass, which is an entirely different animal.
The linked article talks about new federal construction that includes protection from explosions, hurricanes and break-ins. That job is done by our security film. Stopping a bullet requires something else – a very special and very expensive (and thick glass as described in this article:
Over 500,000 s.f. of our security film was installed on DC federal buildings after 9/11, including the pentagon. Yet the cost is a fraction of ballistic glass or even storm shutters.
You are more likely to face a threat from a break-in or hurricane-force winds than a bullet. Like this incident:
Are your prepared?