while I certainly don't condone our controllers falling asleep, at certain airports, it's amazing to me that any of them can remain awake through the night. At some of these out-of-the-way airports, if they get one or two "customers" a night, it's a lot. On the other hand, I can't for the life of me understand how a controller can fall asleep at IAD or DCA. That just boggles my mind, and at the same time, shows how difficult it is to work the back side of the clock.