"I see." And he did see. She had always been as certain that she was right as he'd been convinced that her way was wrong; and his way had fallen. He had no duties. The thought broke over him like one of the great grey curling rollers from the Pacific. I have no duties. It made him feel alone and uneasy. "I promise. Your secrets are safe."

"No matter what you see? And no matter what you decide?"

"Yes," And that was that, as they both knew. Aeneas cursed himself for allowing his emotions to betray him… but she was Laurie Jo, and she couldn't have changed that much. She couldn't.

God, let me be able to join her. Let it always be like this. Because the last two hours have been the happiest I've had in sixteen years.

The tower overlooked a valley ringed by low hills. A forest of cardones, the great sentinel cactus, marched down the sides of the hills to the leveled plain below. Rail lines and huge electric cables snaked through at either end; the plain was filled with concrete blockhouses where the power cables terminated. At the end of each blockhouse was a flat mirror a meter in diameter, and they all pointed toward the installation below them where streamlined cylinders squatted on railroad cars.

The spacecraft were two meters in diameter and five times that tall, and as they waited in neat lines for their turn they reminded Aeneas of machine-gun ammunition grown swollen and pregnant; but their progeny was not war.

Everyone in the tower had been politely respectful, but harried; now they had no time for visitors. Hansen Enterprises carried no dead weight. There were no explainers, not even when the owner came to watch the operations; perhaps especially when Laurie Jo Hansen was present. Aeneas and Laurie Jo were alone in a small, glass-enclosed room, while below a dozen hard-eyed young men sat at consoles.

A clock ticked off the seconds. "We have to be very precise," she told him. "The MHD engines give us half the power we need, but we have to draw the rest directly from the line. There'll be dimouts all over Baja."

"And it costs," Aeneas said.

"Yes. Three thousand megawatts for an hour. At twenty cents a kilowatt hour."

"But you get part of the power directly."

"From burning hydrogen in old rocket engines and sending it through an MHD system. Yes. But the hydrogen and oxygen have to be made. That part of the operation is less efficient than just taking the power from the line, but we have to do it. We can't take everything off the line when we launch." She looked fondly at the capsules below. "We get a lot for my six hundred thousand dollars, Aeneas, Eighty tons go into orbit in the next hour."

The first of the capsules moved over the embankment enclosing the launch area. A roar from beyond the low hills signaled the beginning of the rocket engines: giant engines, but they lay on their sides, their exhaust directed down ceramic tubes protecting copper coils that drew power directly from the hot gasses.

Aeneas couldn't see the launching mirror below the capsule, but suddenly the spacecraft rose and there was a blinding green beam, a solid rod of light over a meter thick extending from the capsule to the ground. The sound rolled past: two hundred and fifty explosions each second as the laser expanded the air in the parabolic chamber below the capsule, and the air rushed out to propel it upward. The two hundred and fifty-cycle note was oddly musical, but very loud at first, then dying away. The spacecraft soon vanished, but the light stayed on for half a minute, tracking the capsule; then it vanished as well.

The mirrors at each blockhouse pivoted slightly, and a second capsule rose from another launch station. The green light tore through roiled air, and there was a humming roar that vibrated the glass of the observation room until the spacecraft was gone and there was only the silent power of the green light. In the half minute that the second capsule absorbed power, a new spacecraft had been placed on the first launch station. The mirrors pivoted again, and it rose; then another, and another.

The laser launchings had been impressive on TV; live they were unbelievable. The long lines of capsules moved toward the earth and concrete emplacements protecting the launching mirror; they reached them; and seconds later, each capsule vanished at 300 gees, shoved upward by a meter-thick column that was nothing more than light, but which looked like a great green growing plant.

"About a thousand kilograms each?" Aeneas asked.

"Exactly a thousand kilos total weight," she said. "We lose fifty kilos of ablating material. The rest goes into orbit, and that's all payload. Any mass is payload. That's what we need up there, Aeneas, mass, any mass-metal, fuel, gases, tankage, even human wastes. We can convert and modify if we have something to start with."

"And you can launch eighty thousand kilos in one hour…"

"Yes. We lose some. Each one of those capsules has to be picked up, somehow. That costs mass. We guide some into rendezvous with Heimdall, but they have to go after most. Still it's cheaper this way-once we start launching, the power scheduling's such that it's better to go on for a full hour."

The lines of capsules had ended; now new ones were brought up. These were longer and slimmer than the others; and when they took their places over the launching mirrors, they rose more slowly.

"Ten gees," she said. "Crew capsules. Ten gees for a minute and a half."

"Isn't that close to human tolerance?"

"Not really." Her voice was cold and distant. "I took it. And if I can-"

He finished the thought for her. "Hansen Enterprises employees will damn well have to. Or starve."

"I want no one who goes only for the money."

They watched the three personnel capsules rise; then the trains brought up more of the unmanned thirty-g cargo capsules, and the pregnant machine gun began again. "And this was what it was all for. Your crusade," he said.

Her smile was wistful, full of triumph and regret. "Yes. I'm not proud of all I've done, Aeneas. You've seen La Paz. Todos Santos. Cabo. Ugly, changed, not what they were when we-not what they were. But the men in Cabo don't go to the mainland looking for work while their families starve. I've done that."

"Yes. You've done that."

"But it was all only fallout, Aeneas. This is what it was for. Heimdall. The rainbow bridge to the stars! And by God it was worth it! You haven't seen the station, Aeneas. And I want you to."

He said nothing, but he looked out at the launching field. The lasers were off now. The great crippled rocket engines were silent. The power from the reactors was back on line, fed to the Baja industries, to Southern California; to the pumps even now cooling the laser installations. To the watermakers that made Baja fertile, for a while. But all that was incidental, because she hadn't lost the dream they'd shared, a dream she'd learned from him in his anger when America retreated from adventure…

She hadn't lost it. He thought he had, once. Not entirely; but he'd been willing to sacrifice it to a larger dream.

Yet what dream was larger than a bridge to the stars?

"And now what?" he asked.

"You've seen what I've done. You don't know what I do to keep it."

"And?"

"And when you do-when you know everything that's happened in the last sixteen years-we'll talk. Not until then." And her eyes were on his, and he saw the hunger and the loneliness, and he prayed to a God he'd half forgotten that it wasn't just a reflection of his own.

They flew high over the Pacific. There were no luxuries in this aircraft; Aeneas and Laurie Jo sat uncomfortably in bucket seats over the wing, and Miguel sat far behind them. Neither the pilot nor the air crew paid them any attention. The pilot was not pleased to have them aboard, no matter that the plane belonged to Laurie Jo Hansen.


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