English: Enterprise at its resting place. The Space shuttle on display at Smithsonian's National Air and Space Museum at the Steven F. Udvar-Hazy Center.

The carbon-carbon along the leading edge of the wing was removed after the Colombia accident in order to test the affects of high velocity foam impacts on those surfaces.

(EDIT: Actually, Enterprise's leading edge was fiberglass. Carbon-carbon was more expensive than necessary for the prototype. It was removed and used for the initial foam impact tests for the same reason. Better to practice with the fiberglass version and test the setup, before moving on to real carbon-carbon, with few spares available.)