system

were introduced, and they showed you politely around. Elisabeth’s interest in what they had to show was moderate. Harold’s kept growing.
“You’re running some rather dangerous experiments here,” he remarked eventually to Derek Alston. This was on another day. There’d been only a scattered few of those blank periods lately.
Derek shook his head. “I don’t run them,” he said. “They’re Solar U and SP projects. The asteroid merely provides facilities.”
“Why do you let them set themselves up here?”
Derek Alston shrugged. “They have to be set up somewhere. If there should be some disastrous miscalculation, our defensive system will contain a