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〃Their orders are to shoot to kill any unidentified intruder that enters our perimeter。〃
〃I hope they perform with greater efficiency than Erich's men at the shipyard。〃
〃There will be no failure at this end；〃 Hugo said firmly。 〃I promise you； brother。〃
〃Any sign of encroachment？〃
〃None；〃 answered Blondi。 〃Our detection…control unit has seen no activity within a hundred and fifty miles of the facility。〃
Elsie looked at her。 〃One hundred and fifty miles does not seem far。〃
〃It's the distance to Little America Number Six； the Yankee Antarctic research station。 Since the station was built； they've shown no interest in our operations。 Our aerial surveillance has yet to detect any attempt to trespass onto our mining facility。〃
〃All is quiet with the Americans；〃 added Hugo。 〃They'll give us no problems。〃
〃I'm not so sure；〃 said Karl。 〃Keep a tight eye on any activity。 I fear their intelligence may be on the verge of discovering our secret。〃
〃Any attempt to stop us；〃 Hugo said confidently； 〃will e too late。 The Fourth Empire is inevitable。〃
〃I sincerely pray that will be the case；〃 said Karl； as he entered the auto ahead of the women。 Usually gallant around the ladies； Karl came from the old German school where men never yielded to women。
The driver of the electric car left the aircraft hangar area and entered a tunnel。 After a quarter of a mile； they entered a vast ice cavern that enclosed a small harbor with long floating docks that rose and fell with the tide from the Ross Sea。 The high…roofed channel that ran from the inner harbor to the sea curved gently； allowing large ships to navigate the passage while the ice cliffs blocked all view from the outside。 Light throughout the plex came from overhead fixtures containing dozens of halogen bulbs。 Four submarines and a small cargo ship were moored beside the docks。 The entire harbor plex was deserted。 The cargo cranes stood abandoned； along with a small fleet of trucks and equipment。 There wasn't a soul to be seen on the docks or the vessels。 It was as if their crews had walked off and never returned。
〃A pity the U…boats that served our venture so efficiently all these years will be lost；〃 said Elsie wistfully。
〃Perhaps they will survive；〃 Blondi consoled her。
Hugo smiled。 〃When the time es； I will personally return to Valhalla to see how they fared。 They deserve to be enshrined for their service to the Fourth Empire。〃
The old tunnel that ran nine miles through the ice between the hidden dock terminal； the aircraft hangar； and then to the sea…mining extraction facility had also been excavated by slaves from the old Soviet Union； their preserved bodies now frozen in a mass grave on the ice shelf。 Since 1985； the tunnel had been expanded and constantly realigned because of the shifting ice。
In the beginning； the efforts to extract valuable minerals from the sea had proved a dismal failure； but with the nanotechnology revolution pioneered by Eric Drexler in California； along with his wife Chris Peterson； Destiny Enterprises had thrown its immense wealth and resources into a project to control the structure of matter。 By rearranging atoms and creating incredibly tiny engines； they had totally reinvented manufacturing processes。 Molecular machines could even produce a tree from scratch。 The Wolfs； however； threw their efforts into extracting valuable minerals such as gold from seawater； a process they'd achieved and gone on to refine until they were producing a thousand troy ounces of gold a day from the Ross Sea； along with platinum； silver； and many other rare elements。 Unlike ore pulled from the ground and then expensively processed by crushers and chemicals； the minerals extracted from the sea came in a nearly pure form。
The engineering center of the Destiny Enterprises sea…mining facility was a great domed structure whose interior looked similar to the vast control room at the NASA space center。 Electronic consoles were manned by thirty scientists and engineers who monitored the puterized electronics of the nanotech mining operation。 But this day； all operations for the extraction of rare metals from the sea had e to a halt； and all Wolf personnel were concentrating their efforts on the ing split of the ice shelf。
Karl Wolf entered the expansive room and stopped in front of a spacious electronic board that hung from the center of the domed ceiling。 In the center； a large map of the Ross Ice Shelf was displayed。 Around the edges； a series of neonlike tubing distinguished the ice from the surrounding land。 The tubing； which stretched from the mining pany around the ice shelf and ended three hundred miles from the opposite end； was green。 The section from where the green ended was continued in red to the edge of the sea。
〃The area in red is yet to be programmed？〃 Karl asked the chief engineer； Jurgen Holtz； who walked up to the Wolf party and gave a sharp nod of his head in greeting。
〃Yes； that is correct。〃 Holtz raised a hand and gestured at the board。 〃We are in the process of setting the molecular triggering devices。 We have about another four hundred miles to program to the end of the tunnel at the sea。〃
Karl studied the constantly changing red letters and numbers on the digital displays spaced around the map。 〃When is the critical moment？〃
〃The final process for splitting off the ice shelf is timed for six hours。 。 。〃 Holtz paused to stare up at a series of numbers showing the time left until doomsday。 〃Twenty…two minutes and forty seconds from now。〃
〃Any problems that might cause a delay？〃
〃None we're aware of All puterized procedures and their backup systems have been inspected and scrutinized dozens of times。 We have yet to find the slightest hint of a possible malfunction。〃
〃An amazing feat of engineering；〃 Karl said quietly； while gazing at the colored tubing surrounding the ice shelf。 〃A pity the world will never know of its existence。〃
〃An amazing feat indeed；〃 echoed Holtz； 〃boring a ten…foot…diameter tunnel fourteen hundred miles through the ice in two months。〃
〃The credit goes to you and your engineers who designed and built the molecular tunneling machine；〃 said Elsie； pointing at a large photo on one wall。 The picture showed a hundred…foot…long circular boring machine with a thrust ram； a debris conveyor； and a strange…looking unit on the front that pulled apart selected molecular bonds within the ice； producing powder…snow…size chunks small enough to be transported to the rear of the conveyors to the open sea。 A secondary unit rebonded the tiny chunks into near…perfect crystalline solid ice that was used to line the tunnel。 When in full operation； the tunneler could bore through fifty miles of ice in twenty…four hours。 Having acplished its purpose； the great machine now sat under a growing sheet of ice outside the mining facility。
〃Perhaps after the ice melts； we'll have an opportunity to use the tunneler again on subterranean rock；〃 Karl said thoughtfully。
〃You think the ice will melt away？〃 asked Elsie； puzzled。
〃If our calculations are ninety…five percent cor