They reached the test facility. The assembly was maybe thirty feet high, its geometry crude, complex, and mysterious. York made out a sleek, upright cylindrical form enclosed by a gantry, a boxy thing of girders. The stack was scuffed, patchy, unpainted. The whole thing was mounted on a flatwagon on the rail track, hooked up to a rudimentary locomotive. Big pipes ran out of the rig and off to other parts of the test station; in the distance she saw the gleam of spherical cryogenic tanks: liquid hydrogen, she guessed.

Petey Priest had his face pressed to the fence around the test facility, so that the wire mesh made patterned indentations on his face; he stared at the rig, evidently captivated.

York watched Conlig and Priest together.

Mike Conlig was a native Texan. At twenty-seven he was a little shorter than York; his build was stocky, his engineer’s hands callused and scarred, and his jet black hair, which he wore tied back in a ponytail, showed his Irish extraction. A slight paunch was pushing out his T-shirt.

York had met Mike half a year ago, at a party at Ricketts House at Caltech, which was a half-hour drive from UCLA. York had gone out there on a kind of dare; women weren’t admitted to Caltech. She enjoyed his fast, lively mind, his genuine readiness to respect her for her intellect… and the compact muscles of his body.

She’d finished up in bed with Mike within a couple of hours.

Mike was quite a contrast to Ben Priest, she thought, looking at them together.

At thirty-one, Ben Priest was tall, wiry, and with an ear-to-ear, kindly grin. He was a Navy aviator with a dozen years’ experience, including two at the Navy’s prime flight test center at Patuxent River, Maryland — and, since 1965, he’d been a NASA astronaut, although he hadn’t yet flown in space.

York knew Mike and Ben had developed a close relationship since Ben’s assignment as astronaut representative on the project. She’d no doubt Mike was throwing himself into the camaraderie of the station — guys together in their prefabricated shacks, at the frontier of technology, playing with NERVA all day, and knocking back a few each evening.

It was having a visible physical effect on Mike, she thought, if not on Ben…

Security lights were coming on all over the nuclear test rig; they made it into a sculpture of shadows and glimmering reflections, an angular, deformed representation of a true spacecraft. As if the ambitions driving the men and women who worked there had actually shaped the geometry of the place, making it into something not quite of the Earth.