Dave Stadt wrote:
Certain politicians do not attend the State of The Union Message for the
very reason that if something were to happen there would still be small but
functioning government.

I once interviewed for a job in the financial world that had the same
deal. Every employee was required to work from home one day a week,
to ensure that there would be something left of the company should the
office be attacked.

It is also very common for companies to forbid more than N officers
(or X% of any department) to fly on the same airline flight.