The heavy machine guns of a Reaper drone hammered against the Land-Crawler’s armor plating, spitting sparks into the dark. Ethan wrenched the manual control lever, veering the massive machine behind a jagged ice wall just as a volley of lead shredded the air where they had been a second before.
From the upper hatch, May didn't hesitate. She drew her mechanical crossbow, her eyes narrowed against the stinging wind.
“Three o'clock! Two more coming in!”
Her bolt whistled through the air, piercing the rotor of a banking drone. The flaming wreck spiraled into the canyon, but the empty space was instantly filled by more buzzing shadows.
“May! Buy me thirty seconds!”
Ethan grabbed a pair of emergency smoke canisters from the dash. They were ancient military surplus, but at this altitude, they would be more than enough. He primed them and hurled them out the shattered window. Thick, white phosphorus smoke billowed across the glacier, clinging to the frozen slopes.
“Now!”
Ethan slammed the lever forward. The Land-Crawler roared into the white shroud, disappearing into a narrow crevice in the canyon wall. While the drones’ sensors scrambled to reacquire their target in the thermal chaos, Ethan veered hard left, slipping into the blind spot of the mountainside.
Five thousand seven hundred meters.
The Land-Crawler finally groaned to a halt at the mouth of a shallow cave. Ethan cut the engine, and for a moment, the only sound was the whistling wind and his own ragged breathing. The cockpit was a ruin of shattered glass and drifted snow.
“…Need to cool the engine,” Ethan rasped, his hands trembling as he checked the gauges. “Ten minutes. Not a second less.”
The red warning lights pulsed like a dying heart. May climbed down from the hatch, her face pale, and began to wordlessly restock her crossbow bolts.
Silence.
Then, May reached down and picked up the photograph again. November 14, 2026. A younger, arrogant Ethan smiling in the NASA control room. The same day the silver rain had turned her world into a graveyard.
“Why were you smiling?”
Her voice echoed in the cramped, freezing cave.
“The day you turned that system on… why were you smiling like that?”
Ethan stared at the frosted coolant pipes, his jaw tight.
“Answer me, Ethan. What were you thinking when you pushed that button?”
“…I thought it was salvation,” Ethan said, his voice cracking like dry ice. “I thought if we cleared the debris in one sweep, humanity could finally reach the stars again. I believed the 0.82 percent error was a negligible margin. I believed my math was flawless.”
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May’s grip tightened on the photograph until the edges crinkled.
“Flawless? My brother was in that 0.82 percent, Ethan. He was just a decimal point in your arrogance.”
“I know.”
Ethan turned to face her. His hands were shaking visibly now.
“I’ve lived with that number every night for five years. 0.82 percent. At first, it was just a probability. A statistic on a whiteboard. An acceptable loss in a grand design. But then… I started seeing the faces.”
He swallowed hard, his throat constricted by more than just the thin air.
“Roughly eighty million people. Every night, the line gets longer in my dreams. People I never knew, just standing there, looking at me. Your brother is probably somewhere in that line, May.”
Ethan covered his face with his grease-stained hands.
“I was called a genius. Flawless calculations, perfect designs. But that perfection killed millions. My certainty was the weapon.”
He couldn't find the breath to continue.
“It’s a miracle you haven't shot me yet. I’ve prayed for someone to do it every night for five years.”
May lowered her crossbow, her fingers still hovering near the trigger.
“…I wanted to. I still want to,” she said, her voice dropping to a low, dangerous whisper. “But if you die, those stars my brother died looking at… we’ll never see them again. And that… I hate that even more than I hate you.”
Ethan nodded slowly, a grim acceptance in his eyes.
“I’ll get us to the base. I’ll open the sky. After that… you do what you have to do.”
Suddenly, the Land-Crawler’s battered radio sputtered to life, a voice cutting through the static.
“—skkkkt— Professor! …do you copy? This is Kyle! —skkkkt—”
Ethan bolted upright, grabbing the receiver.
“Kyle! I hear you! Where are you?!”
“Professor! Finally! I’m transmitting the coordinates now! 1.2 kilometers northwest of your position, altitude 6,100 meters! The entrance is camouflaged behind the main ice wall!”
A flicker of hope ignited in Ethan’s eyes. “Copy that! We’ll be there in twenty!”
“Wait—Professor! Commander Marcus has deployed a Guardian wing! They’ve blockaded the entire sector! They’re scanning with high-gain thermal sensors!”
May stepped up beside Ethan, her eyes hard. “How much further?”
“One point two kilometers. But the last five hundred meters… it’s a vertical climb up the glacier.”
“Then we climb,” May said, her voice as sharp as the wind outside. “Do we have another choice?”
She reached for her crossbow again. Ethan saw the resolve in her eyes and returned to the pilot’s seat.
Five thousand nine hundred meters.
The Land-Crawler emerged from the cave and began its final, agonizing ascent. The engine was still screaming in protest, the temperature gauges pegged in the red, but there was no turning back now. Ethan pumped the manual hydraulics like a madman, forcing the machine to defy gravity.
But the sky was turning a violent, artificial red again.
SHUUUU—!
It wasn't Reapers this time. It was the Guardian wing Marcus had promised. These were three times the size of the scouts, heavy-duty units armed with anti-tank missiles.
“Ethan! Missiles!”
May’s scream was nearly drowned out by the roar of the engines. Ethan grit his teeth.
“I see them! Just five hundred meters to go!”
The Land-Crawler dug its steel talons into the vertical ice wall, ascending inch by agonizing inch.
Six thousand meters.
One of the Guardian drones banked and loosed a missile.
BOOM—!
A massive explosion sheared away the Land-Crawler’s right auxiliary thruster. The entire machine lurched, tilting dangerously as one track lost its grip and spun uselessly over the abyss.
“Hydraulic failure! Engine at critical!”
May shouted over the alarms. Ethan gripped the levers with every ounce of strength he had left.
“Just… a little… more!”
The Land-Crawler staggered up the last hundred meters, crawling toward the coordinates Kyle had sent. And then, at the very threshold of the base, the engine gave its final, metallic shudder and died.
A terrifying, absolute silence crashed down upon them.
Ph.D. in Life Sciences, I wanted to explore the psychological toll that "acceptable margins of error" take on the people who design our future.
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