There are two copies of the VC-25As (747s) kept at Joint Base Andrews, designated SAM 28000 and SAM 29000. Sometimes they'll use a smaller plane for whatever reason -- security/shorter runway/whatevs.

There are at least two copies of the 747s kept at Joint Base Andrews. I seem to recall that there are 3 total. Anyone know? Sometimes they'll use a smaller plane for whatever reason -- security/shorter runway/whatevs.