Lightning

eyes. Near the gate-programming board three men in lab coats— Stefan knew them: Hoepner, Eicke, Schmauser—had collapsed. They tore at themselves as if mad or rabid. All five dying men were trying to scream, but their throats had swollen shut in an instant; they were able to make only faint, pathetic, chilling sounds like the mewling of small, tortured animals. Stefan stood among them, physically unaffected but appalled, horrified, and in thirty to forty seconds they were dead.
    A cruel justice was served in the use of Vexxon against these men, for it had been Nazi-sponsored researchers who had synthesized the first nerve gas in 1936, an organophosphorous ester called tabun. Virtually all subsequent nerve gases—which killed by interfering with the transmission of electrical nerve impulses—had been related to that original chemical compound. Including Vexxon. These men in 1944 had been killed by a futuristic weapon, yet it was a substance that had its origins in their own twisted, death-centered society.
    Nevertheless Stefan took no satisfaction from these five deaths. He had seen so much killing in his life that even the extermination of the guilty to protect the innocent, even murder in the service of justice, repulsed him. But he could do what he had to do.
    He put the pistol on a lab bench. He shrugged the Uzi off his shoulder and put that aside as well.
    From a pocket of his jeans, he withdrew a few inches of wire, which he used to lock open the trigger on the Vexxon. He stepped into the ground-floor corridor and put the canister in the center of that hallway. In a few minutes the gas would spread through the building by way of stairwells, elevator shafts, and ventilation ducts.
    He was surprised to see that only the night lights illuminated the hallway and that the other labs on the ground floor appeared to be deserted. Leaving the gas to disperse, he returned to the gate-programming board in the main lab to learn the date and time to which Heinrich Kokoschka's homing device had brought him. It was eleven minutes past nine o'clock on the night of March 16.
    This was a piece of singularly good luck. Stefan had expected to return to the institute at an hour when most of its staff—some of whom began work as early as six in the morning and some of whom stayed as late as eight o'clock—would be in residence. That would have meant as many as a hundred bodies scattered throughout the four-floor building; and when they were discovered, it would be known that only Stefan Krieger, using Kokoschka's belt and penetrating the institute from the future by way of the gate, could have been responsible. They would realize that he had not come back merely to kill as many of the staff as were on the premises, that he had been up to something else, and they would launch a major investigation to discover the nature of his scheme and undo what damage he had done. But now… if the building was mostly empty, he might be able to dispose of the few bodies in a fashion that would cover his presence and direct all suspicion to these dead men.
    After five minutes the Vexxon cylinder was empty. The gas had spread throughout the structure, with the exception of the two guard foyers at the front and back entrances, which did not share even ventilation ducts with the rest of the building. Stefan went from floor to floor, room to room, looking for more victims. The only bodies he found were those of the animals in the basement, the first time-travelers, and the sight of their pathetic corpses disturbed him as much or more than the five gassed men.
    Stefan returned to the main lab, took five of the special belts from a white cabinet, and buckled the devices on the dead men, over their clothes. He quickly reprogrammed the gate to send the bodies roughly six billion years into the future. He had read somewhere that the sun would have gone nova or would have died in six billion years, and he wanted to dispose of the five men in a place where no one would exist to notice them or to use their belts to home in on the gate.
    Dealing with the dead in that silent, deserted building was an eerie business. Repeatedly he froze, certain that he'd heard stealthy movement. A couple of times he even paused in his labors to go in search of the imagined sound but found nothing. Once he looked at one of the dead men behind him, half convinced that the lifeless thing had started to rise, that the soft scrape he'd heard had been its cool hand clawing for a