They've added on to it quite a bit since your last visit, including a couple more buildings. Some of the aircraft on display now were still active and very guarded back then, one of them being a personal favorite of mine, the Lockheed SR71 Blackbird.
If you click on the exhibits, it lists the aircraft & weapons on display. A pretty amazing collection.
http://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fax