The Center of Military History at Ft. McNair consistently denies that it has the Roswell aliens and their space craft hidden in the third level sub-basement of its building. Thus I doubt they will admit to having the Ark of the Covenant at Ft. Belvoir.
Of course they don't. The pickled aliens are under Hangar 18 at Wright-Patterson. That's why the Foreign Technology Division is located at WPAFB.
They can't hide it forever. There's a line item on the museum specs that reads "subterranean slime pits, pressurized".
Thanks for the ping to this excellent post.
The Roswell aliens are probably in cold storage at Wright-Patterson Air Force Base.
The Ark of the Covenant is said to be in Ethiopia.
Thanks for the ping!