Chapter 16 - THE SUBTERRANEAN SANCTUARY
The stairwell descended over eighty feet into the coastal bedrock before terminating at a heavy, air-tight blast door constructed from three-inch-thick solid steel.
Unlike the high-tech terminal vault back at Coronado, this door featured no digital keypads, no biometric scanners, and no electronic wiring. It was a purely mechanical masterpiece engineered during the height of the Cold War—operated by a massive three-spoke iron wheel set into the center of the plate.
Grace stepped forward, shining her red flashlight over the center wheel.
Engraved into the rusted iron spokes were four small mechanical tumblers, similar to those found on a heavy bank vault.
"A mechanical combination," Grace observed, examining the engraved numbers ranging from zero to ninety-nine. "Did he leave the sequence on the paper in the rifle stock?"
"No," Jack replied, setting the canvas rifle case down on the concrete landing. "Your father never wrote down primary access codes. He said paper was a vulnerability, and memory was the only vault that couldn't be breached by an enemy force."
Grace stared at the tumblers, her mind searching through every conversation, every letter, and every piece of advice her father had ever given her during her childhood.
"Think, Grace," she whispered to herself, her fingers tracing the cold iron spokes of the wheel. "What was the date he always made you memorize? The date he said every Thornton officer had to carry in their blood?"
Her eyes widened suddenly.
"November tenth, seventeen-seventy-five," Grace declared softly. "The founding date of the United States Marine Corps. But he didn't use the standard numerical format."
She gripped the mechanical wheel, turning the first tumbler to 11... the second to 10... the third to 17... and the final tumbler to 75.
A heavy, satisfying THUNK echoed deep within the steel door mechanism as three solid iron locking bars retracted from the granite frame.
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Grace grabbed the iron wheel with both hands, using her full body weight to turn the wheel counterclockwise. The massive blast door groaned against its heavy hinges, swinging inward to reveal a vast, dry room illuminated by the soft, green glow of emergency tritium markers mounted along the walls.
"Welcome to Archangel Prime," Jack whispered, stepping through the threshold into the heart of Colonel Thornton's master bunker.
