They were bearing on the oncoming vehicles that were spreading out now in a loose skirmish line under a roiling layer of dust. The watchdog was getting ready to defend its territory—and I was caught in the middle. A blue-white floodlight lanced out from across the field, glared against the scaled plating of the Bolo. I heard relays click inside the monster fighting machine, and braced myself for the thunder of her battery…

There was a dry rattle.

The guns traversed, clattering emptily. Beyond the fence the floodlight played for a moment longer against the Bolo, then moved on across the ramp, back, across and back, searching…

Once more the Bolo fired its empty guns. Its red I-R beams swept the scene again; then relays snicked, the impotent guns retracted, the port covers closed.

Satisfied, the Bolo heaved itself around and moved off, trailing a stink of ozone and ether, the broken tread thumping like a cripple on a stair.

I waited until it disappeared in the gloom two hundred yards away, then cautiously turned my suit control to vent off the heat. Full insulation could boil a man in his own gravy in less than half an hour.

The floodlight had blinked off now. I got to my hands and knees and started toward the perimeter fence. The Bolo’s circuits weren’t tuned as fine as they should have been; it let me go.

There were men moving in the glare and dust, beyond the rusty lacework that had once been a chain-link fence. They carried guns and stood in tight little groups, staring across toward the blockhouse.

I moved closer, keeping flat and avoiding the avenues of yellowish light thrown by the headlamps of the parked vehicles—halftracks, armored cars, a few light manned tanks.

There was nothing about the look of this crowd that impelled me to leap up and be welcomed. They wore green uniforms, and half of them sported beards. What the hell: had Castro landed in force?

I angled off to the right, away from the big main gate that had been manned day and night by guards with tommy-guns. It hung now by one hinge from a scarred concrete post, under a cluster of dead polyarcs in corroded brackets. The big sign that had read GLENN AEROSPACE CENTER—AUTHORIZED PERSONNEL ONLY lay face down in hip-high underbrush.

More cars were coming up. There was a lot of talk and shouting; a squad of men formed and headed my way, keeping to the outside of the fallen fence.

I was outside the glare of the lights now. I chanced a run for it, got over the sagged wire and across a potholed blacktop road before they reached me. I crouched in the ditch and watched as the detail dropped men in pairs at fifty-yard intervals.