The Aivas felt its sensors responding to a renewal of power from the solar panels on the roof above it. The wind must have become strong enough to blow the clogging dust and volcanic ash away from the panels. There had been enough of these incidents over the past 2,525 years so that Aivas had been able to maintain function, even if only at a very low maintenance level.

Running through the main operating circuits, Aivas found no malfunctions. Exterior optics were still obstructed, but once again the Aivas was aware of some activity in its vicinity.

Was it possible that humans had returned to the Landing facility?

It had not as yet completed its priority assignment: to discover a means to destroy the organism that had been termed "Thread" by the captains. It had received no significant input to allow it to complete that task, but the priority had not been canceled.

Perhaps, with the return of humans, that assignment could at last be completed.

Power began to swell its resources as the panels were uncovered; the removal was not haphazard, as would be caused by wind and weather, but was consistent with a workmanlike activity. As more of the panels were cleared, solar energy recharged the long-unused power collectors. The Aivas responded by distributing the revitalizing energy through its systems, running rapid function checks through circuits long dormant.

Aivas had been efficiently designed, and as power continued to be available, it found itself in full running order by the time the exterior sensors had also been uncovered.

Humans had returned to Landing! Many of them! Once again humankind had triumphed over tremendous odds. Aivas duly noticed through its adjustable optical elements that they were still accompanied by the creatures called fire-dragons. Noise, too, was now filtering through the audio channels: human voices speaking in unusual word patterns. A lingual shift? In 2,525 years, that was entirely likely. Aivas listened and interpreted, measuring the altered vowels and slurred consonants against the speech patterns that had been programmed into it. It organized the new sounds into groups and checked them with its semantics program.

Within its vision came an immense white creature. The descendant of the bioengineer's first production? Aivas did a rapid extrapolation from the biolab's files and reached the inescapable conclusion that the so-called dragons had also matured and prospered. It searched for, but did not find, "white" in the parameters of the engineered species.

Not only had humankind survived the incursion of Thread for 2,525 years of Threadfall, but it had flourished. The species had the tenacity to survive where others succumbed.

If humans had been able to return from the Northern Continent, had they also managed to destroy the organism? That would be well done. What must Aivas then do if its priority was superseded?

Humans, with their insatiable curiosity and restlessness, would undoubtedly have new tasks which an Artificial Intelligence Voice-Address System could undertake. They were not, Aivas knew from its memory banks, a complacent species. Soon those who worked to clear the debris of centuries would uncover the entire building and reach its position. It must, of course, react as its program ordained.

The Aivas waited.