Chapter 56 - Siege of the Iron Vault

The blizzard hit the Colorado Rockies just as our stolen MH-60 Black Hawk—flown by a retired Chief Warrant Officer who owed me his life from the Euphrates—dropped us onto the jagged granite ridge of Mount Rosa.
The wind was screaming at sixty knots, whipping ice crystals into our tactical goggles like needles. Below us, the lights of Colorado Springs were completely dark, an empty grid of concrete buried under six inches of snow. But beneath our boots, the rock vibrated with a deep, rhythmic hum.
The supercomputers of the Apex Directorate were working.
We found the old diesel purge hatch buried beneath three feet of snow and ice. It was a circular iron plate, four feet across, secured with heavy, rust-encrusted bolts. I knelt in the driving snow, a high-frequency pneumatic cutting torch in my gloved hands, burning through the rusted steel while Abigail stood watch with the MP7, her silhouette sharp against the blinding white squall.
"Hatch is clear!" I yelled over the roar of the wind, kicking the severed iron disc inward.
It fell into the black void below, and it took four full seconds before a dull, hollow metallic *clang* echoed up the shaft.
"Eight hundred feet," Abigail shouted, looking down into the dark abyss. "Free rappel. If the friction brakes fail on the ropes, we turn into grease at the bottom."
"Then don't let go of the line," I replied.
We secured our heavy static lines to the high-tensile steel frame of the chimney's rim. We snapped our descent harnesses into place, fitted our closed-circuit rebreather masks over our faces, and stepped off the edge of the world.
The descent through the vertical shaft was a nightmare of pitch-black claustrophobia. The walls of the chimney were slick with decades of petroleum sludge, the air thick with the sulfurous stench of ancient exhaust. Every ten yards, our boots kicked against corroded iron rungs that sheared off and tumbled into the darkness.
At four hundred feet, my comm-link clicked.
"Dad," Abigail's voice came through the bone-conduction headset, calm despite the sheer terror of the fall. "I'm picking up RF emissions directly below us. The Apex network is broadcasting its final synchronization packet. We have less than twelve hours."
"Maintain descent speed," I answered. "Prepare for contact on touchdown. The purge shaft opens into the lower auxiliary cooling room."
Fifty feet from the bottom, the shaft widened. Below us, illuminated by the harsh, clinical glare of white LED light, was the floor of the subterranean cooling chamber.
And standing directly beneath the opening were two Cerberus sentries in full tactical plate, checking a digital manifold.
I didn't hesitate. I released the friction lock on my harness, dropping the final twenty feet in total silence.
I landed directly onto the shoulders of the first sentry, driving him into the concrete deck with the full momentum of my body and gear. His neck snapped with a sharp, sickening crack before he could even raise his weapon. As the second sentry spun around, his shotgun tracking upward, Abigail fired from the rope, two suppressed rounds from her MP7 punching through the side of his skull.
He dropped instantly, his blood pooling into the diamond-plate steel drain.
We cut our harnesses and rolled to our feet in the cold, humming silence of the mountain’s subterranean belly.
We were inside.
Around us, the blast-hardened walls of Cheyenne Mountain rose into vaulted ceilings of raw granite, reinforced with massive steel arches and seismic shock absorbers. Thick bundles of fiber-optic cables, glowing with rhythmic pulses of blue and purple light, snaked along the rock walls like synthetic arteries, leading deeper into the heart of the facility.
"The server core is in Building Four," Abigail whispered, checking the slate’s mapping overlay. "The old NORAD combat operations center."
"Keep your weapon up," I told her, checking the chamber of my MP7. "Julian knows this layout. He’ll have his personal guard layered between here and the core."
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"Good," Abigail said, her eyes flashing with a cold, terrifying intensity that mirrored my own. "I want him to see us coming."
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