If the perimeter guard was this curt with spectators, it couldn't be much of a show.

Then he turns away to join the perimeter guard.

What with the three rings of perimeter guards, no one would get close enough to find out any differently.

Except for the perimeter guards, no one else was there.

According to the perimeter guard, the morning sun offered its usual cold light.

Minutes before, she had gotten a disturbing radio report from the perimeter guard on the north side of the valley.

Which meant they also might not bother with perimeter guards.

The second perimeter guard had been stunned, and the third astonished.

The man disappeared into the jungle to bring in the perimeter guards.

At first, only the perimeter guards came to investigate the source of the voice.