This was the only building she had not previously toured at least superficially; and Thad was seeing to it that her tour here was _not_ superficial at all. But by this time she was chronically half a day behind herself, still absorbing mentally what she had seen in the morning, while she tried to retain what was shown her in the afternoon long enough to digest it that evening. She hadn’t realized; she hadn’t even _begun_ to realize before she came: she had known everything there was to know about Johnny Wendt--except what mattered. She knew the public hero, the lover, and the tortured man. From very far and very near, especially from near--from inside-out almost--she knew him better than, perhaps, she knew herself: certainly better than _he_ knew himself. But now, in his absence, she was learning for the first time in concrete specific terms just _who_ Johnny was--what he had done--and _why_ so many people _gave_ a damn. Nine-tenths of the research inside the Dome was directly connected with what Johnny had brought back from Mars. Half of the total stemmed directly from investigations initiated by either Wendt or Laughlin on Mars, or by Johnny on the trip home. The popular tag, _astronauts_, was misleadingly limited, and Johnny had never done or said anything to correct the misconception for Lee. The fact was, he and Doug had not been sent just to pilot a ship, collect specimens, and carry them safely home. That job could have been accomplished with robots; the justification for risking human life was the requirement of trained human judgment. The two men had not just picked samples: they had decided _what_ to pick; had run the first tests and experiments on the spot; initiated whole lines of research; and judged on the basis of their findings what was worth carrying home and what was not. They had worked hard for a year and more on Mars; and harder, perhaps, training for ten long years before. Between them, they had contained a practicing knowledge of the whole spectrum of analytical and investigative sciences. Doug was the “biologist”--which, in that team, meant doctor, farmer, organic chemist, cook, as well as the branches of the life sciences; Johnny was “physicist,” which meant, in particular, the whole range of cybernetics, from its application to neurology and linguistics, to its most abstruse “big-brain” computing techniques. As such, he was pilot and navigator, engineering crew, construction and repair man, inorganic chemist, civil, mechanical, and electrical engineer, nuclear physicist, and mathematician. It had taken ten years of Academy and post-grad work, and then special training on the Moon, to prepare these two, and a score of others for the complex job. In the end, Johnny and Doug had seemed the best team for the trip.