Left photo is of the Aft bulkhead with Airlock hatch closed.
Photo on right is of the port side Middeck side hatch
where the flight crews ingress and egress the Shuttle.
This photo is Middeck facing forward towards the Avionics bay. This
photo is of the starboard side of the Middeck
This is looking into the Main Engine Compartment .
And this is some of the tiles on the Main Engine heat shield.
The two new looking tiles are new tuffy tiles
that have flown 5 flights with no chipping. The chipping is caused
by ice hitting the tiles after getting caught
in the vortices created by the Main Engine's during launch.