Our "tour" came as a complete surprise. We were waiting at a dock for an hour or so while the consignee was processing the electronic devices we brought. When they were finished, we would take the empty special container in which the devices were shippped back to the airport where we first picked it up.
As we waited, a man approached us and invited us to follow him deeper into the building. We reached a security office where we turned in the badges they gave us at the gate signed for badges that allowed us to follow the man even deeper into the building. He took us into the "semi-clean room" (his words) where were people wearing lab coats, safety glasses, gloves, shoe covers, hair nets and respirator masks were building the space station modules that would be next launched and attached to the space station which was already in orbit.
We were instructed to get no closer than 3 feet from the items and to touch nothing. Our new friend took us around this huge room explaining what was going on at the various work stations. He answered all our questions and let us go anywhere in the room we wanted if we saw something of interest.
We could not believe it as it happened. This tour is one of the most memorable of the many great memories we have formed in our expediter work.