* * *
The clock circuit built into their nanocomputers was at the same time the simplest and yet one of the most useful bits of equipment in the entire Cobra arsenal. Like the traditional soldier's chronometer it enabled widespread forces to synchronize their movements; going that instrument one better, though, it could be tied directly into the rest of the servo network to permit joint action on a microsecond scale. It opened up possibilities that had hitherto been the sole province of automatics, remotes, and the most elite mechanized line troops.
And in exactly twelve minutes and eighteen seconds the gadget would once again pay for itself. Wriggling down the long vent pipe he'd entered from the Wolker Plant's unguarded south filter station, Jonny periodically checked the remaining time against his progress. He hadn't been wild about using this back door—enclosed spaces were the single most dangerous environment a Cobra could be trapped in—but so far it looked like the gamble was going to pay off. The alarms the Trofts had installed at the far end had been easy enough to circumvent, and according to the blueprints he should very soon be exiting into a vat almost directly beneath the building's main entrance. He would then have until the timer ran down to find a position from which the inside door guards were visible.
At one point the Trofts had relied heavily on portable black box sensors to defend converted civilian buildings like this, a practice the underground had gone to great lengths to discourage. The aliens quickly learned that, no matter what thresholds the triggers were set at, their opponents soon figured out how to set off false alarms through them. After sufficient effort had been wasted chasing canine "intruders" and hunting for slingshot-and-firecracker-equipped harassers, they'd pulled out the automatics in favor of live guards equipped with warning sensors and dead-man switches. The system was harder to fool and almost as safe.
Almost.
Ahead of him Jonny could see a spot of dark gray amid the black. The grille leading into the main building, probably, the faintness of the background light indicating that particular room was probably unoccupied. He hoped so; he didn't want to have to cut down any aliens this early in the mission.
The crucial question, of course, was whether or not all the dead-man switches could be deactivated in the microsecond before their owners were wiped out in the synchronized Cobra attack. That task would probably rest on Jonny's shoulders, since any relays for the alarms would be inside. The Trofts had both closed- and open-circuit types of switches, and he would have to determine which kind was being used here before taking action.
He'd reached the grille now. Boosting his optical enhancers, he studied it for alarms and booby-traps. A current detector from his equipment pack located four suspicious wires; jumping them with adjustable-impedance cables, he cut through the mesh with his fingertip lasers and slid through the last two-meter stretch of pipe into an empty vat. There was no provision for releasing its service openings from the inside, but Jonny's lasers took care of that oversight without any trouble. Poking his head out of the opening, he took a careful look around.
He was suspended some five meters above the floor, his vat the largest in a row of similar structures. Four meters away, at eye level, was what looked like the exit from the room, reached from the floor by a set of stairs built into the wall.
Given Troft security thus far, Jonny expected nothing in the way of booby traps to be set up on the floor below. Still, he had just seven minutes to get into position upstairs . . . and to a Cobra a four-meter leap was as easy as a stroll down the walkway. Drawing up his feet, he balanced for a moment on the lip of the vat service opening and pushed off.
The night before he had warned himself of the dangers of apathy. Now, for one awful instant—all the time he had—he recognized that overconfidence extracted an equally bitter price. The sharp twang of released springs filled his enhanced hearing, and the servos within his arms snapped his fingertip lasers into position faster than his brain could register the black wall hurtling itself toward him. But it was an essentially meaningless gesture, and even as the pencils of light flashed out he realized the Trofts had suckered him masterfully. A major military target, an enticing backdoor entrance with inadequate alarms, and finally a mid-air trap that used his helpless ballistic trajectory to neutralize the speed and strength advantage of his servos.
The flying wall reached him, and he had just enough time to notice it was actually a net before it hit, wrapping itself around him like a giant cocoon. A split second later he was jerked sharply off his original path as unnoticed suspension lines reached their limit, snapping him back to hang more or less upside down in the middle of the room.