"That's ridiculous. Who issued that order?"

"It came from the director's office of Special Service," Derec replied. "Their authorization was legal."

"But Phylaxis-"

"We were removed, Ariel. Period."

She stared at the screens before her, but Derec was sure she saw nothing on them. She absently scratched her chin once.

"I see. And you think I-we-had something to do with that?"

"The thought had occurred to me," Derec said drily.

Ariel nodded slowly, still looking at the screens. "You said no one knows you have this copy?"

"No one has shown up yet to take it away from us." That elicited a grin.

"Do you have any theories about what this is?" She pointed at the screen.

"The staff told me that just before the assault, the RI took itself off-line to play a game. It was completely unaware of what was happening in the gallery until it came back online and witnessed the aftermath."

"And that's when the collapse began."

"Exactly," Derec said. "Now, the paradox loops and the mirror sites suggest that something was physically attached to the RI network. When I asked about problems with the RI before this, I was told that a few glitches had occurred, but they were minor and they'd been told that 'adjustment errors' were to be expected, to contact the Calvin Institute about them before contacting us. Most were dismissed."

"Adjustment errors…" Ariel stood and walked slowly around the lab. After one full circuit she stopped directly in front of Derec. "What do you want from me?"

"To Start with, I'd like to know who issued that maintenance directive."

"You want my help."

"Just-" Derec began.

"You want me to pry into the operations of my own people to see if any of them are somehow culpable." Her voice was growing edged, caustic.

"Ariel-"

"You want me to help you figure out why the RI went insane."

"Well"

"You want me to forget about everything else, drop my responsibilities, and be a spy for you." Ariel folded her arms across her chest and grunted derisively. "I have to credit you, Derec-you have nerve."

Derec could feel his own irritation grow. He feared a repeat of their last fight. "Are you going to tell me you're not interested in this?"

Ariel glared at him briefly. "Damn you, yes. You knew that would happen, once I saw this." She slapped the top of the console. "You relied on that. You used it."

"And you hate being used. "

"Damn it-!"

"Then help us," Derec said softly. "Whoever did this is using you in a much worse way. Whoever did this did it to kill Galiel Humadros and Clar Eliton. They also killed the two surviving members of Eliton's security team. It will get worse. At the very least, this completely discredits positronics on Earth. This undoes everything Eliton hoped to do. Even if the conference goes on now, without finding the people responsible nothing will be accomplished. Tell me this doesn't concern you."

Ariel caught herself, face red, mouth open to respond. "I need to know more."

Derec felt a moment of hope, a brief twinge of success. He ran the tip of his tongue over his lips, folded his arms, and, in as calm a voice as he could manage, told her what he had learned. All the while he watched her, hoping he could still trust what he saw in her expression. Rana kept glancing over the top of her console at Ariel, who sat on the opposite side of the lab, arms folded, staring at the floor.

"What are you wondering?" Derec asked finally.

Rana gave him an annoyed look. "She enters a couple of commands and in half a second gets to where it took me hours to fail to reach." She shook her head. "I'm not sure if I'm wondering or just resenting."

"Ariel's one of the best."

"Along with you?"

"Sometimes I think she's better."

"How long will she take to make up her mind?"

Derec looked at Ariel. "I don't know. It will take as long as it takes."

Rana shook her head. "I was really excited when I found out you knew Ariel Burgess. It was a major disappointment when it turned out you weren't on speaking terms anymore." She glanced at him. "I knew there was a problem between you two, but…"

"Philosophical differences. "

"You said that before."

"You didn't believe me?"

"People don't usually display that much heat over philosophy."

"Not the abstract kind, no. But when it relates directly to what you do, who you are…" Derec frowned. "She believes I betrayed her trust. We… it sounds like a clichй, but we really had everything together for a while."

"Until?"

"Until I started playing around with the ideas that became Bogard." He looked at Rana. "You can be damn nosy."

Rana shrugged. She began to say more, then nodded toward Ariel. "Decision time?"

Ariel was walking toward them.

"We'll see," Derec whispered.

Ariel leaned on the console. "What do you think is going on?"

"Obviously, someone had a stake in seeing the conference stopped or at least rendered useless. I don't think anything constructive can come of it now."

"Do you believe what the news nets are saying? That it was the Managins?"

"No."

"Why not?"

"They don't have the resources," Derec replied. "The will, yes, but the ability to subvert the Resident Intelligence of a facility like Union Station? Get several armed people inside? And then escape?" He shook his head. "I gather no other arrests have been made?".

"None that I'm aware of."

"Someone used the Managins, maybe."

"Who?"

Derec shrugged. "I don't know."

"Do you think the Calvin Institute is involved?" Ariel asked.

"Someone issued that maintenance directive. Someone who understood the nature of positronics and knew what I might find."

Ariel's mouth was a thin, hard line. "I can't disagree. Not entirely. But I have another problem."

"Which is?"

"That robot of yours. The bodyguard unit. Why did it fail?"

Derec felt himself stiffen. "I don't know. "

"You admit that it did?"

"It… something went wrong."

"It was designed to defend a primary subject, correct? In this case, Senator Eliton. It didn't. Eliton died. Why?"

"I wish I knew. It's more complicated than that, even. From what I saw, it was defending Eliton. Then, for some reason, it abandoned him."

"Perhaps your design was faulty?"

Derec hesitated. "Perhaps." He had not wanted to admit that possibility-especially not to Ariel-but he could not reject it.

"Or was it subverted the same way the RI was?" Ariel asked.

That surprised him. "I can't see how. But I don't know how the RI was subverted, so your guess is as good as anyone else's. There's no way to tell. If I had Bogard here, I might be able to determine what went wrong, but it's gone. Destroyed."

Ariel tapped a finger absently while she regarded Derec. Suddenly, she slapped both hands on the top of the console. "All right, I'll help you. I've got unanswered questions myself. But I want to know what we're supposed to do if we find something."

"Like what?"

"Like what we both suspect-that this is more than the actions of a group of disaffected bigots. Unless those bigots have members in the government."

"I suppose that depends on just who it is we find. If it's the authorities, we can't very well go to them, can we?"

"It's not likely to be all of them."

"No, but-"

"The problem, Derec, is that whoever is behind this, the consequences of uncovering it could be worse than leaving it alone."

"Are you serious?"

"Perfectly," Ariel replied. "Right now, as much as I hate to admit it, we have a diplomatic crisis. We're left with a shattered program and we have to start allover. What we do not have is a war. Push this and that's exactly what we might have."

"War? You're overstating a bit, aren't you?" Rana asked.

"I already told you: I'm perfectly serious. If it becomes clear that the Terran government, or a part of it, engineered an assassination of an Auroran ambassador, the only conclusion Aurora and the Fifty Worlds can make is that Earth cannot be trusted. They could decide that the only way to deal with it then is containment. No more Settlers will be permitted out. No more trade. No more anything. Isolation."

"Is that doable?" Derec asked.

Ariel shook her head. "No, not entirely. We can't even get rid of the pirates that have been raiding the lanes. But it doesn't matter. It's enough to set off a war."

"So who would benefit from that?"

"I don't know. Someone always benefits from a war. But that's one possible outcome of this." Ariel paused. "So. I'll ask again. What do we do when we find out?"

"We may not be able to do anything. I think we need to find out what we can first, then decide."

"No going off on your own. We decide."

Derec nodded. "Agreed."

"All right. Where do you want to start?"

"Well… getting inside Union Station would be good. I need to do a physical inspection to see what's been done to the matrix."

"I may be able to help with that."

"Good. That will do for a start."

Ariel gave him a curious smile. "It would really help if you could talk to Bogard?"

"Of course it would! But-"

Ariel's smile broadened. "Why don't you come with me. I have something to show you."