I have to say that Terminal C & D are horrific compared to A & B.

A & B is spacious, clean looking and seems to be brighter with natural light and has better shops... maybe because it is used as the primary international terminal.

Whereas C & D is dark, cramped and has a dirty feel to it.

For a hub, especially an alledged gateway, it should be improved. I guess I'm use to so it doesn't bother me, but it is shame that Dulles can't make better improvements on the terminal.

Dulles should implode C & D.