For the first lunar-landing mission, I was assigned to the 7:00 P.M.to 7:00 A.M. shift. Usually I would take my time walking from the warm,humid parking lot into the artificially bright and cold transcription room where typewriter keys clacked like chattering teeth. There, a weary day-shift editor would hand over his headphones, mumble his goodbye, and leave. On one particular July night, however, things were distinctly different.