I was able to view the Endeavor up close while it was in maintenance at the Palmdale facility. It was fascinating to see it up close and to walk underneath it. We got a demonstration of the tile material. It is amazingly light and not at all something you would think would make it through re-entry. The thing that most surprised me was the puffy white cloth panels that covered the outside. For some reason I never realized all the white you see was actually varying thicknesses of insulation squares. Pictures of it always seem to make it look smooth but in actuality it is quite different up close.