For a moment, she considered the only possible exit-Strathmore's elevator. But she knew it was useless; the electronics never would have survived the blast.

But as Susan made her way through the thickening smoke, she recalled Hale's words. The elevator runs on power from the main building! I've seen the schematics! Susan knew that was true. She also knew the entire shaft was encased in reinforced concrete.

The fumes swirled all around her. She stumbled through the smoke toward the elevator door. But when she got there, she saw that the elevator's call button was dark. Susan jabbed fruitlessly at the darkened panel, then she fell to her knees and pounded on the door.

She stopped almost instantly. Something was whirring behind the doors. Startled, she looked up. It sounded like the carriage was right there! Susan stabbed at the button again. Again, a whirring behind the doors.

Suddenly she saw it.

The call button was not dead-it had just been covered with black soot. It now glowed faintly beneath her smudged fingerprints.

There's power!

With a surge of hope, she punched at the button. Over and over, something behind the doors engaged. She could hear the ventilation fan in the elevator car. The carriage is here! Why won't the damn doors open?

Through the smoke she spied the tiny secondary keypad-lettered buttons, A through Z. In a wave of despair, Susan remembered. The password.

The smoke was starting to curl in through the melted window frames. Again she banged on the elevator doors. They refused to open. The password! she thought. Strathmore never told me the password! Silicon smoke was now filling the office. Choking, Susan fell against the elevator in defeat. The ventilation fan was running just a few feet away. She lay there, dazed, gulping for air.

She closed her eyes, but again David's voice woke her. Escape, Susan! Open the door! Escape! She opened her eyes expecting to see his face, those wild green eyes, that playful smile. But the letters A-Z came into focus. The password… Susan stared at the letters on the keypad. She could barely keep them in focus. On the LED below the keypad, five empty spots awaited entry. A five-character password, she thought. She instantly knew the odds: twenty-six to the fifth power; 11,881,376 possible choices. At one guess every second, it would take nineteen weeks…

As Susan Fletcher lay choking on the floor beneath the keypad, the commander's pathetic voice came to her. He was calling to her again. I love you Susan! I've always loved you! Susan! Susan! Susan…

She knew he was dead, and yet his voice was relentless. She heard her name over and over.

Susan… Susan…

Then, in a moment of chilling clarity, she knew.

Trembling weakly, she reached up to the keypad and typed the password.

S… U… S… A… N

An instant later, the doors slid open.

Chapter 108

Strathmore's elevator dropped fast. Inside the carriage, Susan sucked deep breaths of fresh air into her lungs. Dazed, she steadied herself against the wall as the car slowed to a stop. A moment later some gears clicked, and the conveyor began moving again, this time horizontally. Susan felt the carriage accelerate as it began rumbling toward the main NSA complex. Finally it whirred to a stop, and the doors opened.

Coughing, Susan Fletcher stumbled into a darkened cement corridor. She found herself in a tunnel-low-ceilinged and narrow. A double yellow line stretched out before her. The line disappeared into an empty, dark hollow.

The Underground Highway…

She staggered toward the tunnel, holding the wall for guidance. Behind her, the elevator door slid shut. Once again Susan Fletcher was plunged into darkness.

Silence.

Nothing except a faint humming in the walls.

A humming that grew louder.

Suddenly it was as if dawn were breaking. The blackness thinned to a hazy gray. The walls of the tunnel began to take shape. All at once, a small vehicle whipped around the corner, its headlight blinding her. Susan stumbled back against the wall and shielded her eyes. There was a gust of air, and the transport whipped past.

An instant later there was a deafening squeal of rubber on cement. The hum approached once again, this time in reverse. Seconds later the vehicle came to a stop beside her.

"Ms. Fletcher!" an astonished voice exclaimed.

Susan gazed at a vaguely familiar shape in the driver's seat of an electric golf cart.

"Jesus." The man gasped. "Are you okay? We thought you were dead!"

Susan stared blankly.

"Chad Brinkerhoff," he sputtered, studying the shell-shocked cryptographer. "Directorial PA."

Susan could only manage a dazed whimper. "TRANSLTR…"

Brinkerhoff nodded. "Forget it. Get on!"

***

The beam of the golf cart's headlights whipped across the cement walls.

"There's a virus in the main databank," Brinkerhoff blurted.

"I know," Susan heard herself whisper.

"We need you to help us."

Susan was fighting back the tears. "Strathmore… he…"

"We know," Brinkerhoff said. "He bypassed Gauntlet."

"Yes… and…" The words got stuck in her throat. He killed David!