“The library is beautiful, and the setting. It is also an illustration of how we don’t anticipate the most obvious consequences. This happened to us in a major way with the bomb in Los Alamos. As for the ceiling for the library, we wanted the best light, the light in just the right way. . . . In the daylight it turned out to be wonderful. But no one, not one of us, foresaw that not only would light come in, but it would go out—into the sky.”