The Breach - Ghost Country - Deep Sky

were anyone out there transmitting on them. We didn’t hear anything.”
    She finished off the Pepsi and set it aside.
    “The only other thing we could do from a remote location like that was try to get through to a communication satellite. Our hope was that we might find one with some retrievable data on board. Something we could make sense of. Anything. But signals from those satellites are a lot harder to receive than GPS. You can’t pick them up with a handheld unit bouncing around in your pocket. You need a dish, and you need to know exactly where to point it. Engineers handle that problem by putting comm satellites in geostationary orbit, right above the equator and matched to the spin of the Earth. That way the satellite is always in the same place, relative to the ground. But that wasn’t going to help us: if those orbits had decayed much at all, the satellites would be lower, and orbiting faster. They wouldn’t be stationary anymore. So when it came to aiming the dish, we’d be shooting in the dark at moving targets.”
    Her eyebrows went up in a shrug. “We had to try, though. So we did. We picked a spot above the equator, well below geostationary altitude, and we transmitted a maintenance ping every thirty seconds. A universal signal most satellites would respond to, if they heard it. We did that for hours and hours, all through the afternoon and into the evening, but there was no reply. We kept it going anyway. There was reason to believe it could take a while. In the meantime we tested other things. We figured out the use of the delayed shutoff button. We also figured out what the sequence of tones had been all about, the first time we’d switched on one of the cylinders.”
    Paige looked past Travis to the backpack lying in the empty chair next to him. She stared at the shape of the cylinder inside.
    “It was locking out changes,” she said.
    Travis glanced at Bethany, then looked at Paige again. “Locking out changes?”
    Paige nodded. “It’s hard to explain. Hard to understand in the first place. In my case, I just saw it in action. While Pilar was working with the satellite gear, I had an idea I wanted to try. I took the second cylinder, and in the present time I drove one of the electric Jeeps to a little sandstone boulder about half a mile north of Border Town.”
    Travis recalled the rock she was talking about, though he’d only seen it a few times. It was about the size of a compact car, and it was the only thing larger than a scrub plant within miles of the elevator housing on the surface.
    “The idea was pretty simple,” Paige said. “I wanted to see an action in the present reflected in the future. I came up with one that should’ve been foolproof. I turned on the cylinder and positioned it facing the boulder. I looked at it in the present and in the future. The two versions of the rock were identical; whatever amount of erosion is going on out there, it doesn’t happen fast. Anyway, I got out the Jeep’s tire iron, and you can probably guess what I did with it.”
    Bethany’s face lit up as the idea came to her. “You scratched the rock in the present time, so you could see the same scratch appear in the future.”
    “You’d think it would show up there, wouldn’t you?” Paige said.
    “How could it not?” Bethany said.
    Paige shrugged. “I can only tell you that it didn’t. I scratched the hell out of the boulder in the present. I chipped a crevice two inches deep into its surface. But in the future, the scratch wasn’t there. It just wasn’t. The rock was as smooth as ever.”
    Bethany stared. Met Travis’s eyes. Looked at Paige again. She couldn’t seem to find the words for her level of disbelief.
    “Changes are locked out,” Paige said. “I think it’s that simple, however the hell it works. I think when those tones were sounding, the first time we switched these things on, the cylinders were locking onto whatever future we were on track toward at that moment. Independent of changes we’d make later on, once we could see the future for ourselves.”
    “Changes locked out…” Bethany said. “But you don’t mean our future is locked… do you?”
    Paige shook her head. “Just the future we see through the projected opening. Think of it this way. Suppose these cylinders only showed us a future ten days ahead of the present. You might look through and see yourself going about a normal day. You might also see a newspaper with next Saturday’s