Courtesy of NASA The space shuttle docked with the International Space Station. Courtesy of NASA The Space Shuttle on the ground. Last year, the National Aeronautics and Space Administration selected four sites to permanently display a space-shuttle orbiter, and the California Science Center in Los Angeles will house the Endeavour. As an aerospace engineer, architect and believer in the modernist tradition, I have some suggestions for the exhibit.The plans so far call for exhibiting the orbiter both horizontally and, later, vertically, as if it were ready for launch. But I have another concept: Dock the Endeavour to a full-scale mock-up