21.   Tkachenko, like many Russians here, would solve the problem by installing fences, watchtowers, trip wires and a legitimate border guard force.

22.   Police said a trip wire attached to the front door and the grenade had triggered the blast.

23.   Bosnian Serbs said Thursday they were trying to plant trip wires for land mines.

24.   Bosnian Serbs said Thursday that they were trying to plant trip wires for land mines.

25.   Egeland said the military had been ordered to remove trip wires from the mines immediately, and that it should have been done sooner.

26.   Fragmentation mines are placed above ground and are triggered by a trip wire.

27.   He has triggered an invisible trip wire, detonating a mortar round rigged as a booby trap along the road while he marched headlong into enemy-held terrain.

28.   Inside one newly deserted foxhole, crudely constructed of logs and plastic sheeting, they gently prodded the ground with their bayonets, checking for mines or trip wires.

29.   One soldier was killed when he walked into a trip wire that was booby trapped.

30.   Some are detonated by remote control, sensors or trip wire.