The look of alarm that shot between Kohler and Langdon was not lost on Vittoria. Kohler rolled toward her again. "You created a specimen larger than five hundred nanograms?"

"A necessity," Vittoria defended. "We had to prove the input/yield threshold could be safely crossed." The question with new fuel sources, she knew, was always one of input vs. yield—how much money one had to expend to harvest the fuel. Building an oil rig to yield a single barrel of oil was a losing endeavor. However, if that same rig, with minimal added expense, could deliver millions of barrels, then you were in business. Antimatter was the same way. Firing up sixteen miles of electromagnets to create a tiny specimen of antimatter expended more energy than the resulting antimatter contained. In order to prove antimatter efficient and viable, one had to create specimens of a larger magnitude.

Although Vittoria’s father had been hesitant to create a large specimen, Vittoria had pushed him hard. She argued that in order for antimatter to be taken seriously, she and her father had to prove two things. First, that cost-effective amounts could be produced. And second, that the specimens could be safely stored. In the end she had won, and her father had acquiesced against his better judgment. Not, however, without some firm guidelines regarding secrecy and access. The antimatter, her father had insisted, would be stored in Haz-Mat—a small granite hollow, an additional seventy-five feet below ground. The specimen would be their secret. And only the two of them would have access.

"Vittoria?" Kohler insisted, his voice tense. "How large a specimen did you and your father create?"

Vittoria felt a wry pleasure inside. She knew the amount would stun even the great Maximilian Kohler. She pictured the antimatter below. An incredible sight. Suspended inside the trap, perfectly visible to the naked eye, danced a tiny sphere of antimatter. This was no microscopic speck. This was a droplet the size of a BB.

Vittoria took a deep breath. "A full quarter of a gram."

The blood drained from Kohler’s face. "What!" He broke into a fit of coughing. "A quarter of a gram? That converts to… almost five kilotons!"

Kilotons. Vittoria hated the word. It was one she and her father never used. A kiloton was equal to 1,000 metric tons of TNT. Kilotons were for weaponry. Payload. Destructive power. She and her father spoke in electron volts and joules—constructive energy output.

"That much antimatter could literally liquidate everything in a half-mile radius!" Kohler exclaimed.

"Yes, if annihilated all at once," Vittoria shot back, "which nobody would ever do!"

"Except someone who didn’t know better. Or if your power source failed!" Kohler was already heading for the elevator.

"Which is why my father kept it in Haz-Mat under a fail-safe power and a redundant security system."

Kohler turned, looking hopeful. "You have additional security on Haz-Mat?"

"Yes. A second retina-scan."

Kohler spoke only two words. "Downstairs. Now."

The freight elevator dropped like a rock.

Another seventy-five feet into the earth.

Vittoria was certain she sensed fear in both men as the elevator fell deeper. Kohler’s usually emotionless face was taut. I know, Vittoria thought, the sample is enormous, but the precautions we’ve taken are—

They reached the bottom.

The elevator opened, and Vittoria led the way down the dimly lit corridor. Up ahead the corridor dead-ended at a huge steel door. HAZ-MAT. The retina scan device beside the door was identical to the one upstairs. She approached. Carefully, she aligned her eye with the lens.

She pulled back. Something was wrong. The usually spotless lens was spattered… smeared with something that looked like… blood? Confused she turned to the two men, but her gaze met waxen faces. Both Kohler and Langdon were white, their eyes fixed on the floor at her feet.

Vittoria followed their line of sight… down.

"No!" Langdon yelled, reaching for her. But it was too late.

Vittoria’s vision locked on the object on the floor. It was both utterly foreign and intimately familiar to her.

It took only an instant.

Then, with a reeling horror, she knew. Staring up at her from the floor, discarded like a piece of trash, was an eyeball. She would have recognized that shade of hazel anywhere.

The security technician held his breath as his commander leaned over his shoulder, studying the bank of security monitors before them. A minute passed.

The commander’s silence was to be expected, the technician told himself. The commander was a man of rigid protocol. He had not risen to command one of the world’s most elite security forces by talking first and thinking second.

But what is he thinking?

The object they were pondering on the monitor was a canister of some sort—a canister with transparent sides. That much was easy. It was the rest that was difficult.

Inside the container, as if by some special effect, a small droplet of metallic liquid seemed to be floating in midair. The droplet appeared and disappeared in the robotic red blinking of a digital LED descending resolutely, making the technician’s skin crawl.

"Can you lighten the contrast?" the commander asked, startling the technician.

The technician heeded the instruction, and the image lightened somewhat. The commander leaned forward, squinting closer at something that had just come visible on the base of the container.

The technician followed his commander’s gaze. Ever so faintly, printed next to the LED was an acronym. Four capital letters gleaming in the intermittent spurts of light.

"Stay here," the commander said. "Say nothing. I’ll handle this."

Haz-Mat. Fifty meters below ground.

Vittoria Vetra stumbled forward, almost falling into the retina scan. She sensed the American rushing to help her, holding her, supporting her weight. On the floor at her feet, her father’s eyeball stared up. She felt the air crushed from her lungs. They cut out his eye! Her world twisted. Kohler pressed close behind, speaking. Langdon guided her. As if in a dream, she found herself gazing into the retina scan. The mechanism beeped.

The door slid open.

Even with the terror of her father’s eye boring into her soul, Vittoria sensed an additional horror awaited inside. When she leveled her blurry gaze into the room, she confirmed the next chapter of the nightmare. Before her, the solitary recharging podium was empty.

The canister was gone. They had cut out her father’s eye to steal it. The implications came too fast for her to fully comprehend. Everything had backfired. The specimen that was supposed to prove antimatter was a safe and viable energy source had been stolen. But nobody knew this specimen even existed! The truth, however, was undeniable. Someone had found out. Vittoria could not imagine who. Even Kohler, whom they said knew everything at CERN, clearly had no idea about the project.

Her father was dead. Murdered for his genius.

As the grief strafed her heart, a new emotion surged into Vittoria’s conscious. This one was far worse. Crushing. Stabbing at her. The emotion was guilt. Uncontrollable, relentless guilt. Vittoria knew it had been she who convinced her father to create the specimen. Against his better judgment. And he had been killed for it.

A quarter of a gram…

Like any technology—fire, gunpowder, the combustion engine—in the wrong hands, antimatter could be deadly. Very deadly. Antimatter was a lethal weapon. Potent, and unstoppable. Once removed from its recharging platform at CERN, the canister would count down inexorably. A runaway train.