Chapter 52 - The Nitrogen Seal
Arthur’s breath puffed white against the beam of the lantern as he leaned over the oilcloth manifest.
"That's Leonard's handwriting, Diane," Arthur whispered, his fingers trembling against the heavy paper. "Not a forged signature from an offshore syndicate. That is Leonard's personal supply officer script."
"He didn't just bury two gold keys in Óbidos, Arthur," I said, staring at the four vibrating mechanical reefers. "He parked a sovereign military reserve on four hundred yards of private Carolina iron fifty years ago."
"What is in these cars, Diane?"
"We don't read guesses," I answered, gripping the heavy beryllium spanner. "We inspect the seals."
We walked the length of the track toward Car One, our boots crunching over the frozen ballast stones. The sound of the diesel refrigeration compressor grew louder, a deep, concussive hum that shook the iron coupling pins.
The massive sliding door of the lead boxcar was sealed not with an ordinary lead customs tag, but with a four-bolt industrial locking flange forged from polished chrome-moly steel.
Frosted vapor hissed continuously from a pressure-relief nozzle welded into the doorframe. The ambient temperature around the sill was twenty degrees colder than the winter night.
"Liquid nitrogen refrigeration," Arthur noted, shining the beam on the digital temperature gauge inset into the steel panel. "Minus forty degrees Fahrenheit. Maintained continuously through an auxiliary rail-power shunt."
"The beryllium wrench," I said, looking down at the four-pronged tool in my hand.
The wrench head matched the four recessed drive bolts on the chrome flange with microscopic precision. Non-sparking metal, designed specifically for hazardous chemical or ordnance environments.
I fitted the wrench into the top drive bolt and threw my weight down against the handle.
The fifty-year-old threads groaned under the torque, popping loose with a sharp, pneumatic crack that echoed off the pine trees. One by one, I backed out the four heavy bolts, dropping them into my coat pocket.
Arthur stepped up beside me, catching the secondary release lever with both hands.
"Together, Diane," he said.
We pulled.
The heavy insulated door slid back six inches along its overhead roller tracks, releasing a concussive cloud of sub-zero nitrogen vapor that rolled over our boots like white water.
Arthur swept the halogen light into the interior of the car.
The inside was entirely lined with reinforced, diamond-plate stainless steel.
Lashed to the floor with heavy nylon cargo strapping were thirty-six industrial, vacuum-jacketed cryogenic storage cylinders, each standing waist-high, stenciled with the gold eagle crest of the United States Department of Energy.
And stenciled across the front of each cylinder was a classification label that turned the blood in my veins to solid ice:
RESTRICTED DATA — NAVAL NUCLEAR PROPULSION PROGRAM. HIGH-PURITY ENRICHED ISOTOPE CORE MATERIAL — OPERATION KEYSTONE ESCROW.
Arthur stumbled backward off the track ballast, his hand flying to his chest. "My God... Leonard wasn't holding palladium scrap in Setúbal, Diane. He was holding naval reactor fuel."
Before I could speak, the twin headlights of an approaching vehicle flashed through the loblolly pines along the haul road.
It wasn't a police cruiser.
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It was an unmarked, midnight-blue federal tactical transport, its grille lights pulsing in rapid strobes of silent amber.
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