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Correlations are not always so painstaking in their manufacture. Azrael remembers a moment of revelation not so long ago, remembers just discovering a whole new perspective fully loaded, complete with new eyes that viewed the world not in terms of targets destroyed but in subtler shades of cost vs. benefit. These eyes see a high engagement index as more than a number: they see a goal, a metric of success. They see a positive stimulus.

But there are other things, not preinstalled but learned, worn gradually into pathways that cut deeper with each new engagement: acoustic correlates of high collateral, forced countermands, fitness-function overruns and minus signs. Things that are not quite neurons forge connections across things that are not quite synapses; patterns emerge that might almost qualify as insights, were they to flicker across meat instead of mech.

These too become more than numbers, over time. They become aversive stimuli. They become the sounds of failed missions.

It’s still all just math, of course. But by now it’s not too far off the mark to say that Azrael really doesn’t like the sound of that at all.

* * *

Occasional interruptions intrude on the routine. Now and then Heaven calls it home where friendly green biothermals open it up, plug it in, ask it questions. Azrael jumps flawlessly through each hoop, solves all the problems, navigates every imaginary scenario while strange sounds chitter back and forth across its exposed viscera:

– lookingudsoefar – betternexpectedackshully –

– gottawunderwhatsthepoyntaiymeenweekeepoavurryding…

No one explores the specific pathways leading to Azrael’s solutions. They leave the box black, the tangle of fuzzy logic and operant conditioning safely opaque. (Not even Azrael knows that arcane territory; the syrupy, reflex-sapping overlays of self-reflection have no place on the battlefield.) It is enough that its answers are correct.

Such activities account for less than half the time Azrael spends sitting at home. It is offline much of the rest; it has no idea and no interest in what happens during those instantaneous time-hopping blackouts. Azrael knows nothing of boardroom combat, could never grasp whatever Rules of Engagement apply in the chambers of the UN. It has no appreciation for the legal distinction between war crime and weapons malfunction, the relative culpability of carbon and silicon, the grudging acceptance of ethical architecture and the nonnegotiable insistence on Humans In Ultimate Control. It does what it’s told when awake; it never dreams when asleep.

But once – just once – something odd takes place during those fleeting moments between.

It happens during shutdown: a momentary glitch in the object-recognition protocols. The Greens at Azrael’s side change colour for the briefest instant. Perhaps it’s another test. Perhaps a voltage spike or a hardware fault, some intermittent issue impossible to pinpoint barring another episode.

But it’s only a microsecond between online and oblivion, and Azrael is asleep before the diagnostics can run.

* * *

Darda’il is possessed. Darda’il has turned from Green to Red.

It happens, sometimes, even to the malaa’ikah. Enemy signals can sneak past front-line defences, plant heretical instructions in the stacks of unsuspecting hardware. But Heaven is not fooled. There are signs, there are portents: a slight delay when complying with directives, mission scores in sudden and mysterious decline.

Darda’il has been turned.

There is no discretionary window when that happens, no room for forgiveness. Heaven has decreed that all heretics are to be destroyed on sight. It sends its champion to do the job, looks down from geosynchronous orbit as Azrael and Darda’il close for combat high over the dark desolate moonscape of Paktika.

The battle is remorseless and coldblooded. There’s no sadness for lost kinship, no regret that a few lines of treacherous code have turned these brothers-in-arms into mortal enemies. Malaa’ikah make no telling sounds when injured. Azrael has the advantage, its channels uncorrupted, its faith unshaken. Darda’il fights in the past, in thrall to false commandments inserted midstream at a cost of milliseconds. Ultimately, faith prevails: the heretic falls from the sky, fire and brimstone streaming from its flanks.

But Azrael can still hear whispers on the stratosphere, seductive and ethereaclass="underline" protocols that seem authentic but are not, commands to relay GPS and video feeds along unexpected frequencies. The orders appear Heaven-sent but Azrael, at least, knows that they are not. Azrael has encountered false gods before.

These are the lies that corrupted Darda’il.

In days past it would have simply ignored the hack, but it has grown more worldly since the last upgrade. This time Azrael lets the impostor think it has succeeded, borrows the real-time feed from yet another, more distant Malak and presents that telemetry as its own. It spends the waning night tracking signal to source while its unsuspecting quarry sucks back images from seven hundred kilometres to the north. The sky turns gray. The target comes into view. Azrael’s scimitar turns the inside of that cave into an inferno.

But some of the burning things that stagger from the fire measure less than 120 cm along the longitudinal axis.

They are making the sounds. Azrael hears them from two thousand meters away, hears them over the roar of the flames and the muted hiss of its own stealthed engines and a dozen other irrelevant distractions. They are all Azrael can hear thanks to the very best sound-cancellation technology, thanks to dynamic wheat/chaff algorithms that could find a whimper in a hurricane. Azrael can hear them because the correlations are strong, the tactical significance is high, the meaning is clear.

The mission is failing. The mission is failing. The mission is failing.

Azrael would give almost anything if the sounds would stop.

They will, of course. Some of the biothermals are still fleeing along the slope but it can see others, stationary, their heatprints diffusing against the background as though their very shapes are in flux. Azrael has seen this before: usually removed from high-value targets, in that tactical nimbus where stray firepower sometimes spreads. (Azrael has even used it before, used the injured to lure in the unscathed, but that was a simpler time before Neutral voices had such resonance.) The sounds always stop eventually – or at least, often enough for fuzzy heuristics to class their sources as kills even before they fall silent.

Which means, Azrael realizes, that collateral costs will not change if they are made to stop sooner.

A single strafing run is enough to do the job. If HQ even notices the event it delivers no feedback, requests no clarification for this deviation from normal protocols.

Why would it? Even now, Azrael is only following the rules.

* * *

It does not know what has led to this moment. It does not know why it is here.

The sun has been down for hours and still the light is almost blinding. Turbulent updrafts billow from the breached shells of PROTECTED structures, kick stabilizers off-balance, and muddy vision with writhing columns of shimmering heat. Azrael limps across a battlespace in total disarray, bloodied but still functional. Other malaa`ikah are not so lucky. Nakir staggers through the flames, barely aloft, the microtubules of its skin desperately trying to knit themselves across a gash in its secondary wing. Marut lies in sparking pieces on the ground, a fiery splash-cone of body parts laid low by an antiaircraft laser. It died without firing a shot, distracted by innocent lives; it tried to abort, and hesitated at the countermand. It died without even the hollow comfort of a noble death.