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He stared at the card and wondered what exactly would happen if he dialed the binary of 87。 He tried to imagine the sequence of events： Who would he talk to？ Would someone call him back？ Would there be an inquiry； a referral to higher authority？
He rubbed his eyes and stared at the card； and finally he shrugged。 One way or the other； he would find out。
He tore a sheet of paper from the pad in front of him； next to the telephone； and wrote：
2^0
2^1
2^2
2^3
2^4
2^5
2^6
2^7
This was the basis of the binary system： base two raised to some power。 Two to the zero power was one； two to the first was two； two squared was four； and so on。 Manchek quickly wrote another line beneath：
2^0 …》 1
2^1 …》 2
2^2 …》 4
2^3 …》 8
2^4 …》 16
2^5 …》 32
2^6 …》 64
2^7 …》 128
Then he began to add up the numbers to get a total of 87。 He circled these numbers：
2^0 …》 （1）
2^1 …》 （2）
2^2 …》 （4）
2^3 …》 （8）
2^4 …》 （16）
2^5 …》 （32）
2^6 …》 （64）
2^7 …》 （128）
= （87）
And then he drew in the binary code。 Binary numbers were designed for puters which utilize an on…off； yes…no kind of language。 A mathematician once joked that binary numbers were the way people who have only two fingers count。 In essence； binary numbers translated normal numbers which require ten digits； and decimal places to a system that depended on only two digits； one and zero。
2^0 …》 （1） …》 1
2^1 …》 （2） …》 1
2^2 …》 （4） …》 1
2^3 …》 （8） …》 0
2^4 …》 （16） …》 1
2^5 …》 （32） …》 0
2^6 …》 （64） …》 1
2^7 …》 （128） …》 0
Manchek looked at the number he had just written； and inserted the dashes： 1…110…1010。 A perfectly reasonable telephone number。 Manchek picked up the telephone and dialed。 The time was exactly twelve midnight。
DAY 2
Piedmont
5。 The Early Hours
THE MACHINERY WAS THERE。 THE CABLES； THE codes； the teleprinters had all been waiting dormant for two years。 It only required Manchek's call to set the machinery in motion。
When he finished dialing； he heard a series of mechanical clicks； and then a low hum； which meant； he knew； that the call was being fed into one of the scrambled trunk lines。 After a moment； the humming stopped and a voice said； 〃This is a recording。 State your name and your message and hang up。〃
〃Major Arthur Manchek； Vandenberg Air Force Base； Scoop Mission Control。 I believe it is necessary to call up a Wildfire Alert。 I have confirmatory visual data at this post； which has just been closed for security reasons。〃
As he spoke it occurred to him that it was all rather improbable。 Even the tape recorder would disbelieve him。 He continued to hold the telephone in his hand； somehow expecting an answer。
But there was none； only a click as the connection was automatically broken。 The line was dead； he hung up and sighed。 It was all very unsatisfying。
Manchek expected to be called back within a few minutes by Washington； he expected to receive many calls in the next few hours； and so remained at the phone。 Yet he received no calls； for he did not know that the process he had initiated was automatic。 Once mobilized； the Wildfire Alert would proceed ahead； and not be recalled for at least twelve hours。
Within ten minutes of Manchek's call； the following message clattered across the scrambled maximum…security cable Five minutes later； there was a second cable which named units of the nation： the men on the Wildfire team：
***
=UNIT=
TOP SECRET
CODE FOLLOWS
AS
CBW 9/9/234/435/6778/90
PULG COORDINATES DELTA 8997
MESSAGE FOLLOWS
AS
WILDFIRE ALERT HAS BEEN CALLED。 REPEAT WILDFIRE ALERT HAS BEEN CALLED。 COORDINATES TO READ NASA/AMC/NSC B DEC。 TIME OF MAND TO READ LL…59…07 ON DATE。
FURTHER NOTATIONS
AS
PRESS BLACKFACE POTENTIAL DIRECTIVE 7…L2 ALERT STATUS UNTIL FURTHER NOTICE
END MESSAGE
=
DISENGAGE
***
This was an automatic cable。 Everything about it； including the announcement of a press blackout and a possible directive 7…12； was automatic； and followed from Manchek's call。
***
=UNIT=
TOP SECRET
CODE FOLLOWS
AS
MESSAGE FOLLOWS AS THE FOLLOWING MALE AMERICAN CITIZENS ARE BEING PLACED ON ZED KAPPA STATUS。 PREVIOUS TOP SECRET CLEARANCE HAS BEEN CONFIRMED。 THE NAMES ARE＋
STONE； JEREMY 。。81
LEAVITT； PETER 。。04
BURTON； CHARLES 。L51
CHRISTIANSENKRIKECANCEL THIS LINE CANCEL
TO READ AS
KIRKE； CHRISTIAN 。142
HALL； MARK 。L77
ACCORD THESE MEN ZED KAPPA STATUS UNTIL FURTHER NOTICE
END MESSAGE END MESSAGE
In theory； this cable was also quite routine； its purpose was to name the five members who were being given Zed Kappa status； the code for 〃OK〃 status。 Unfortunately； however； the machine misprinted one of the names； and failed to reread the entire message。 （Normally； when one of the printout units of a secret trunk line miswrote part of a message； the entire message was rewritten； or else it was reread by the puter to certify its corrected form。）
The message was thus open to doubt。 In Washington and elsewhere； a puter expert was called in to confirm the accuracy of the message； by what is called 〃reverse tracing。〃 The Washington expert expressed grave concern about the validity of the message since the machine was printing out other minor mistakes； such as 〃L〃 when it meant 〃1。〃
The upshot of all this was that the first two names on the list were accorded status； while the rest were not； pending confirmation。
***
Allison Stone was tired。 At her home in the hills overlooking the Stanford campus； she and her husband； the chairman of the Stanford bacteriology department； had held a party for fifteen couples； and everyone had stayed late。 Mrs。 Stone was annoyed： she had been raised in official Washington； where one's second cup of coffee； offered pointedly without cognac； was accepted as a signal to go home。 Unfortunately； she thought； academics did not follow the rules。 She had served the second cup of coffee hours ago； and everybody was still there。
Shortly before one a。m。； the doorbell rang。 Answering it； she was surprised to see two military men standing side by side in the night。 They seemed awkward and nervous to her； and she assumed they were lost； people often got lost driving through these residential areas at night。
〃May I help you？〃
〃I'm sorry to disturb you； ma'am；〃 one said politely。 〃But is this the residence of Dr。 Jeremy Stone？〃
〃Yes；〃 she said； frowning slightly。 〃It is。〃
She looked beyond the two men； to the driveway。 A blue military sedan was parked there。 Another man was standing by the car； he seemed to be holding something in his hand。
〃Does that man have a gun？〃 she said。
〃Ma'am；〃 the man said；〃 we must see Dr。 Stone at once。
It all seemed strange to her； and she found herself frightened。 She looked across the lawn and saw a fourth man； moving up to the house and looking into the window。 In the pale light streaming out onto the lawn； she could distinctly see the rifle in his hands。
〃What's going on？〃
〃Ma'am； we don't want to disturb your party。 Please call Dr。 Stone to the door。〃
〃I don't know if〃
〃Otherwise； we will have to go get him；〃 the man said。
She hesitated a moment； then said； 〃Wait here。〃
She stepped back and started to close the door； but one man had already slipped into the hall。 He stood near the door； erect and very polite； with his hat in his hand。 〃I'll just wait here； ma'am；〃 he said； and smiled at her。
She walked back to the party； trying to show nothing to the guests。 Everyone was still talking and laughing； the room was noisy and dense with smoke。 She found Jeremy in a c