AFAIK, the Capitol and the White House have always been under a P-XXXX
designation, have they not?

Yes, there are teeny prohibited areas around those two buildings. The
rest of our Captal was unencubered until we got the Class Bravo. Even
then, all it required was a clearance, just like around any large airport.

The FRZ is thirty miles across, and covers the entire city.

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.