Night Probe!

"On our way." Mercier motioned toward the door. "Shall we?"
They stepped into the White House cabinet room. A blue rug matched the drapes and on the north wall a portrait of Harry Truman peered from above the fireplace. The President sat at the center of a huge oval mahogany table, his back to the terrace overlooking the rose garden. Directly opposite, the vice president scratched notes on a pad. Admiral Kemper was present as was Secretary of Energy Dr. Ronald Klein, Secretary of State Douglas Oates and the Director of Central Intelligence, Martin Brogan.
The President came over and greeted Sandecker warmly. "It's a pleasure to see you, Admiral. Please sit down and get comfortable. I believe you know everyone present."
Sandecker nodded and took a vacant chair at the end of the table. He sat alone and distant from the others.
"Now then," the President said for openers, "suppose you tell us about your mysterious Doodlebug."
Dirk Pitt's secretary, Zerri Pochinsky, walked into the computer room with a cup of coffee and a sandwich on a tray. The rims of her hazel eyes were watery. She found it difficult to accept the fact of her boss's death. The shock of losing someone so close had not fully settled about her. It would come later, she knew, when she was alone.
She found Giordino straddling a chair, his elbows and chin nestled on the backrest. He was staring at the row of inert computers.
She sat down next to him. "Your favorite," she said softly. "Pastrami on wheat."
Giordino shook his head at the sandwich but drank the coffee. The caffeine did little to relieve the frustration and anger of having had to watch Pitt and the others die while he stood helpless to prevent it.
"Why don't you go home and get some sleep," Zerri said. "Nothing can be accomplished by staying here."
Giordino spoke as if in a trance. "Pitt and I went back a long way."
"Yes, I know."
"We played high-school football together. He was the shrewdest, most unpredictable quarterback in the league."
"You forget, I've been present when you two reminisced. I can almost give you an instant replay."
Giordino turned to her and smiled. "Were we that bad?"
Zerri smiled back through her tears. "You were that bad."
A team of computer technicians came through the door. The man in charge came over to Giordino. "Sorry to interrupt, but I have orders to break down the project and move the equipment to another section of the departments."
"Erase- the-evidence time, is it?"
"Sir?"
"Did you clear this with Dr. King?"
The man solemnly nodded his head. "Two hours ago. Before he left the building."
"Speaking of home," said Zerri. "Come along. I'll do the driving."
Obediently Giordino rose to his feet and rubbed his aching eyes. He held the door open and gestured for Zerri to exit first. He started to follow her, but suddenly stopped on the threshold.
He came within a hair of missing it. Later, he could never explain why an unfathomable urge made him turn for one final look.
The wink of light was so brief he would have missed it if his eyes hadn't been aimed in the right direction at the right moment. He shouted at the technician who had just switched off the circuits. "Turn them back on!"
"What for?" demanded the technician.
"Damn it, turn the circuits back on!"
One look at Giordino's scowling features was enough. There was no argument this time. The technician did as he was told.
Suddenly the room lost all dimension. Everyone recoiled as though witnessing the birth of some grotesque apparition. Everyone except Giordino. He stood immobile, his lips spreading in a surprised, joyous smile.
One by one, the computers returned to life.
"Let me get this straight," said the President, his face clouded with doubt. "You say this Doodlebug of yours can see through ten miles of solid rock?"
"And identify fifty-one different minerals and metal traces within it," Sandecker replied without blinking an eye. "Yes, Mr. President, I said exactly that."
"I didn't think it was possible," said CIA Director Brogan. "Electromagnetic devices have had limited success measuring the electrical resistivity of underground minerals, but certainly nothing of this magnitude."
"How is it a project of such importance was researched and developed without presidential or congressional knowledge?" asked the vice-president.
"The former president knew," Sandecker explained. "He had a fancy for supporting futuristic concepts. As I'm sure you're aware of by now, he secretly funded an undercover think tank called Meta Section. It was Meta Section scientists who designed the Doodlebug. Wrapped in security, the plans were given to NUMA. The President arranged the bankroll, and we built it."
"And it actually works?" the President pressed.
"Proof positive," Sandecker answered. "Our initial test runs have pinpointed commercially obtainable deposits of gold, manganese, chromium, aluminum and at least ten other elements including uranium."
The men around the table had a varied display of expressions. The President looked at Sandecker strangely. Admiral Kemper's face was impassive. The rest stared in open disbelief.
"Are you suggesting you can determine the extent of the deposit as well as an appraisal of its worth?" Douglas Oates asked dubiously.
"Within a few seconds of detecting the element or mineral, the Doodlebug computes a precise evaluation of ore reserve data, projected mining costs and operating profits and, of course, the exact coordinates of the location." If Sandecker's audience had appeared skeptical before, they looked downright incredulous now. Energy Secretary Klein asked the question that was on everyone's mind.
"How does the thing work?"
"The same basic principle as radar or marine depth sounders, except that the Doodlebug transmits a sharply focused, concentrated pulse of energy straight down into the earth. This high energy beam, similar in theory to a radio station that broadcasts different sound tones over the air, throws out various signal frequencies that are reflected by the geological formations it encounters. My engineers refer to it as sweep modulation. You can compare it to shouting across a canyon. When your voice hits a rock wall, you get a distinct echo. But if there are trees or foliage in the way, the echo comes back muffled."
"I still don't understand how it can identify specific minerals," said a confused Klein.
"Each mineral, each element in the makeup of the earth resonates at its own peculiar frequency. Copper resonates at about two thousand cycles. Iron at twenty-two hundred. Zinc at four thousand. Mud, rock and sand shale each have an individual signature that determines the quality of the signal that strikes and reflects off its surface. On a computer display, the readout looks like a vivid cross-section of the earth, because the various formations are color-coded."
"And you measure the depth of the deposit by the signal's time lag," Admiral Kemper commented. "You're quite right."
"Seems to me the signal would weaken and become distorted the deeper it goes," said Mercier.
"It does," admitted Sandecker. "The beam loses energy as it passes through the different earth layers. But by recording each encounter during the penetration, we've learned to expect and recognize the deviant reflections. We call this density tracking. The computers analyze the effect and transmit the corrected data in digital form."