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〃None whatsoever；〃 Stone said； much later。 〃It has apparently mutated to a benign form。 We're still waiting for a bizarre report of death or disease； but it's been six hours now； and it gets less likely with every minute。 We suspect that ultimately it will migrate back out of the atmosphere； since there's too much oxygen down here。 But of course if the bomb had gone off in Wildfire。。。〃
Hall said； 〃How much time was left？〃
〃When you turned the key？ About thirty…four seconds。〃
Hall smiled。 〃Plenty of time。 Hardly even exciting。〃
〃Perhaps from where you were；〃 Stone said。 〃But down on Level V； it was very exciting indeed。 I neglected to tell you that in order to improve the subterranean detonation characteristics of the atomic device； all air is evacuated from Level V； beginning thirty seconds before explosion。〃
〃Oh；〃 Hall said。
〃But things are now under control；〃 Stone said。 〃We have the organism； and can continue to study it。 We've already begun to characterize a variety of mutant forms。 It's a rather astonishing organism in its versatility。 〃 He smiled。 〃I think we can be fairly confident that the organism will move into the upper atmosphere without causing further difficulty on the surface； so there's no problem there。 And as for us down here； we understand what's happening now； in terms of the mutations。 That's the important thing。 That we understand。〃
〃Understand；〃 Hall repeated。
〃Yes；〃 Stone said。 〃We have to understand。〃
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EPILOGUE
OFFICIALLY； THE LOSS OF ANDROS V； THE MANNED spacecraft that burned up as it reentered the atmosphere； was explained on the basis of mechanical failure。 The tungsten…and…plastic…laminate heat shield was said to have eroded away under the thermal stress of returning to the atmosphere； and an investigation was ordered by NASA into production methods for the heat shield。
In Congress； and in the press； there was clamor for safer spacecraft。 As a result of governmental and public pressure； NASA elected to postpone future manned flights for an indefinite period。 This decision was announced by Jack Marriott； 〃the voice of Andros；〃 in a press conference at the Manned Spaceflight Center in Houston。 A partial transcript of the conference follows：
Q： Jack； when does this postponement go into effect？
A： Immediately。 Right as I talk to you； we are shutting down。 Q： How long do you anticipate this delay will last？
A： I'm afraid that's impossible to say。 Q： Could it be a matter of months？ A： It could。 Q： Jack； could it be as long as a year9
A： It's just impossible for me to say。 We must wait for the findings of the investigative mittee。
Q： Does this postponement have anything to do with the Russian decision to curtail their space program after the crash of Zond 19？
A： You'd have to ask the Russians about that。
Q： I see that Jeremy Stone is on the list of the investigative mittee。 How did you happen to include a bacteriologist？
A： Professor Stone has served on many scientific advisory councils in the past。 We value his opinion on a broad range of subjects。
Q： What will this delay do to the Mars…landing target date？
A： It will certainly set the scheduling back。
Q： Jack； how far？
A： I'll tell you frankly； it's something that all of us here would like to know。 We regard the failure of Andros V as a scientific error； a breakdown in systems technology； and not as a specifically human error。 The scientists are going over the problem now； and we'll have to wait for their findings。 The decision is really out of our hands。
Q： Jack； would you repeat that？
A： The decision is out of our hands。
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