“Of course. But the cradle is more advanced and refined than that. It monitors not just the heartbeat but lots of other physiological indicators such as blood pressure, body temperature, and so forth, and conducts a comprehensive analysis of these parameters. If they’re not normal, then it immediately stops the anti-trigger signal in the dead-man’s switch. It can also recognize many of my simple voice commands.”
A nervous-looking man entered the auditorium and whispered something into Garanin’s ear. Before he had finished whispering, Garanin glanced up at Rey Diaz with a peculiar look in his eyes, which did not escape the keen-eyed representatives.
“There’s a way to disarm your cradle. Countermeasures for anti-triggers were studied during the Cold War, too,” the US representative said.
“It’s not my cradle. It’s the cradle for those hydrogen bombs. If the cradle stops rocking, they’ll wake up,” Rey Diaz said.
“I’ve thought of the same technique,” the German representative said. “When the signal is transmitted from your watch to Mercury, it must pass through a complicated communications link. Destroying or shielding any node, then using a false signal source to continue to transmit the anti-trigger signal farther down the chain, will render your cradle system useless.”
“That is indeed a problem,” Rey Diaz said, with a nod at the German representative. “Without the sophons, the problem is easily solved. All the nodes are loaded with an identical encryption algorithm that generates every signal sent. To the outside world, it looks as if the signal values are random and different every time, but the cradle’s sender and recipient produce a sequence of values that are identical. Only when the recipient receives a signal corresponding to its own sequence is the signal considered valid. Without this encryption algorithm, the signal sent out by your false source won’t match the recipient’s sequence. But the damn sophons can detect the algorithm.”
“You’ve perhaps come up with another approach?” someone asked.
“A crude approach. Me, all my approaches are clumsy and crude,” Rey Diaz said, with a self-mocking laugh. “I have increased the sensitivity of each node’s monitoring of its own state. Specifically, each communication node is composed of several units that may be separated by a large distance, but are connected into a whole by continuous communication. If any one unit fails, the entire node will issue a command terminating the anti-trigger, after which, even if the false signal source resumes sending a signal to the next node, it will not be acknowledged. The monitoring of every unit can achieve a microsecond level of accuracy, which means that—using the German representative’s approach—every unit of a node must be simultaneously destroyed and the signal resumed from the false signal source within the space of a microsecond. Every node is composed of at least three units, but may have dozens of them. These units are separated by a distance of about three hundred kilometers. Each one is built to be extremely rugged, and it will issue its warning upon any outside touch. Causing these units to fail within the space of a microsecond might be possible for the Trisolarans, but it’s not currently possible for humans.”
His final sentence put everyone on alert.
“I have just received a report that the thing on Rey Diaz’s wrist has been sending out an electromagnetic signal,” Garanin said. The atmosphere of the assembly turned tense at the news. “I’d like to ask you, Wallfacer Rey Diaz: Is the signal from your wristwatch being sent to Mercury?”
Rey Diaz chuckled a few times, then said, “Why would I be sending it to Mercury? There’s nothing there but a giant pit. Besides, the cradle’s space communication link hasn’t been set up yet. No, no, no. You don’t need to worry. The signal isn’t going to Mercury. It’s going somewhere in New York City, very close to us.”
The air froze, and everyone in the assembly, apart from Rey Diaz, stood as shocked as wooden chickens.
“If the signal sustaining the cradle is terminated, what will it trigger?” the UK representative asked sharply, no longer attempting to mask his tension.
“Oh, something will be triggered, all right,” Rey Diaz said to him with a broad laugh. “I’ve been a Wallfacer for more than twenty years, and I’ve always been able to get a few things of my own.”
“Well then, Mr. Rey Diaz, would you be able to answer an even more direct question?” the French representative said. He looked entirely calm, but there was a tremble in his voice. “How many lives will you, or will we, be responsible for?”
Rey Diaz widened his eyes at the Frenchman, as if he thought the question bizarre. “What? The number of people makes a difference? I thought all of you here were respectable gentlemen who prize human rights above all. What’s the difference between one life and 8.2 million? If it’s the former, then you don’t have to respect it?”
The US representative stood up and said, “More than twenty years ago when the Wallfacer Project began, we pointed out what he was.” Pointing a finger at Rey Diaz and spraying saliva as he spoke, he strove to contain himself, but ended up losing control. “He’s a terrorist. An evil, filthy terrorist! A devil! You unstopped the bottle and let him loose, and you must take responsibility! The UN must be held responsible!” he shouted hysterically, sending his papers flying.
“Calm down, Mr. Representative,” Rey Diaz said with a slight smile. “The cradle is very sensitive to my physiological indices. If I were to go into hysterics like you, if my mood wavered, it would immediately stop sending the anti-trigger signal. So you, and all of you sitting here, shouldn’t make me too upset. It would be better for all of us if you could try and keep me happy.”
“What are your conditions?” Garanin asked softly.
A bit of sadness crept into the smile on Rey Diaz’s face as he turned toward Garanin and shook his head. “Mr. Chair, what other conditions could I name? To leave here and return to my own country. A charter plane is waiting for me at Kennedy Airport.”
The assembly was silent. Unconsciously, they had all gradually turned their attention from Rey Diaz to the US representative, who, unable to stand all the eyes on him, threw himself back into his chair and hissed, “Get the hell out.”
Rey Diaz slowly nodded, then stood up and walked out.
“Mr. Rey Diaz, I’ll take you home,” Garanin said, leaving the rostrum.
Rey Diaz stood waiting for Garanin as he walked over, less nimbly than before. “Thank you, Mr. Chair. I thought you might like to get out of here too.”
The two were at the door when Rey Diaz grabbed Garanin and turned with him back toward the auditorium. “Gentlemen, I won’t miss this place. I’ve wasted these two decades, and no one here understands me. I want to go back to my homeland, back to my people. Yes, my homeland and my people. I miss them.”
To everyone’s surprise, the big man’s eyes shone with tears. At last he said, “I want to go back to my homeland. This is not part of the plan.”
When he walked out the door of the UN General Assembly building, Rey Diaz opened his arms wide to the sun and called out with relish, “Ah, my sun!” His two-decade-long heliophobia had vanished.
Rey Diaz’s flight took off, and crossed the eastern coastline to fly over the vast Atlantic Ocean.
In the cabin, Garanin said to him, “With me here, this aircraft is safe. Please tell me the location of the device you have connected to the dead-man’s switch.”
“There’s no device. There’s nothing. It was just a trick to escape.” Rey Diaz took off his watch and handed it to Garanin. “This is just a simple transmitter converted from a Motorola phone. It’s not connected to my heartbeat, either. It’s been turned off. Keep it as a souvenir.”
For a long time neither of them spoke. Then Garanin sighed and said, “How did this happen? The Wallfacers’ privilege of sealed-off strategic thinking was meant to be used against the sophons and Trisolaris. But you and Tyler both used it against humanity.”