Chapter 48 - The Collapse of the Citadel

The screech of the tactical entry team’s hydraulic spreaders echoed through the granite chamber like the screams of dying machinery.
Suddenly, the cold, stunned silence of Eleanor Cross cracked. Her eyes, wide and glassy with shock, snapped toward the emergency console beside the liquid nitrogen cooling manifold.
"If I cannot hold the reserve," Eleanor hissed, her voice warping into a guttural shriek, "then no one will!"
Her hand slapped down onto a recessed, heavy red switch protected by a glass casing—the emergency purge valve for the server room's subterranean cryogenic systems.
"Marcus, out!" Evelyn yelled.
A deafening hiss exploded from the ceiling. Thick, blinding clouds of sub-zero liquid nitrogen vapor blasted from the overhead conduits, instantly dropping the room's temperature by sixty degrees. The air in Evelyn's lungs crystallized on intake, burning her throat with extreme cold.
Marcus lunged forward, grabbing Evelyn by the arm and hauling her backward toward the service hatch as the floor tiles beneath them shattered from the sudden thermal shock, cracking like frozen lake ice.
Behind them, Eleanor didn't run for the ladder. She scrambled through a hidden side door cut into the granite rock—a private escape conduit leading directly to the upper helipad.
"She’s heading for the Super Puma!" Marcus shouted, his words choked by the freezing fog. He shoved Evelyn through the lower hatch, dropping back onto the cogwheel track just as the server room above became a zero-oxygen, sub-zero death zone.
Evelyn hit the grated platform, rolled, and pushed herself to her feet. The frost clung to her eyelashes and the wool of her collar, but the adrenaline surging through her veins burned white-hot.
"The external maintenance stairs," Evelyn said, pointing up through a vertical ventilation shaft where an iron spiral staircase climbed toward the roof. "If that helicopter takes off in this weather, she clears the ridge before the police can scramble an interceptor!"
They bolted up the spiral stairs, their boots ringing out against the iron treads. Two hundred feet of sheer vertical climb through the dark rock. The sound of the helicopter’s twin turboshafts roared louder with every flight, the vibrations rattling their teeth in their skulls.
Evelyn burst through the heavy roof hatch out onto the open-air landing platform.
A blizzard had descended upon the peak. Freezing gale-force winds whipped across the concrete pad, driving needles of ice horizontally through the air. The Eurocopter Super Puma was already five feet off the ground, its tail rotor swinging as the pilot fought the mountain downdrafts.
Through the cockpit window, Evelyn could see Eleanor strapped into the front passenger seat, screaming at the pilot to pull pitch and climb.
"It's out of range!" Marcus shouted over the screaming gale, raising his sidearm but realizing the impossibility of a clean shot through the armored windscreen in a blizzard.
Evelyn didn't reach for a gun. She sprinted across the snow-slicked concrete toward the pad’s emergency fueling station.
The heavy, steel-reinforced high-pressure aviation fuel line was still connected to the pad's subterranean pumps, its emergency breakaway coupling dangling near the edge of the terrace. Evelyn grabbed the heavy nozzle, hauled the line to the perimeter rail, and slammed the manual override valve wide open.
A massive jet of pressurized kerosene shot into the air, straight into the downdraft of the helicopter’s massive main rotor.
The hurricane-force vortex of the spinning blades sucked the atomized jet fuel directly into the turbine air intakes.
A turbine engine cannot ingest raw, unmetered fuel without compressor stalls. Within two seconds, twin concussive bangs echoed across the peak as the Super Puma’s engines backfired violently, coughing out massive plumes of orange flame and black smoke.
The helicopter shuddered violently, losing all lift.
"Down!" Marcus tackled Evelyn to the concrete just as the heavy aircraft spun out of control.
The Super Puma’s skids slammed back down onto the concrete pad with a catastrophic crunch, collapsing the landing gear. The spinning main blades clipped the steel antenna tower at the edge of the pad, shattering with the force of artillery shells and sending jagged carbon-fiber fragments slicing through the blizzard.
The fuselage skidded twenty yards across the ice, coming to a shuddering halt against the perimeter retaining wall, tilted at a severe thirty-degree angle over the sheer three-thousand-foot drop into the valley below.
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The engines whined to a smoking, dead stop.
The only sound left was the howling of the alpine wind.