21.   They almost never leave the encirclement of concertina wire around this base, they said.

22.   They have already erected barriers against a terrorist vehicle assault, strung coils of concertina wire, and implemented security checks on persons entering the base.

23.   Today, the post remains lightly staffed but on alert, ringed by concertina wire and bristling with surveillance cameras and high-tech listening devices.

24.   Two weeks later, Zapatistas and soldiers are still staring at each other angrily across a coil of concertina wire in a humid clearing.

25.   U.N. soldiers were laying concertina wire at the gate to the airport in an effort to stop desperate crowds from pushing their way toward the relative comfort inside.

26.   Twenty-foot-high chain-link fences are topped with concertina wire.

27.   When I was there, there was concertina wire.

28.   Within the adobe walls, under the harsh white glow of Halogen lights, the prisoners will be segregated inside cells made of concertina wire.

29.   American forces shooed children away from doorways and blocked surrounding streets with guards and rolls of concertina wire.

30.   American forces shooed curious children away from doorways and blocked surrounding streets to journalists with rolls of concertina wire and armed guards.