Surveyor 3 was one of five automated spacecraft that successfully soft-landed and operated on the lunar surface, acquired a vast amount of new scientific and engineering data, and provided a firm foundation for subsequent manned landings on the Moon. When we designed and launched these Surveyors, there was no plan for them to be visited by astronauts in subsequent manned missions. Some of us, however, had the quiet hope that, at some later date, astronauts...