1.   It has been replaced by dead-bolt locks, security chains, electronic alarm systems and trip wires hooked up to a police station or private guard firm.

2.   Trip wire was found on several of its approaches to its set.

3.   Trip wire was found on several of the approaches to its set.

4.   And over the years, they have come across trip wires connected to rat traps spring-loaded with shotgun shells.

5.   Antipersonnel mines can be set off by pressure switches that activate when stepped on, trip wires or sensors that detect vibration.

6.   Along the way, they encountered a series of simulated events, from sniper fire to trip wires connected to mines.

7.   But Rollins thrives on obstacles and trip wires, and his band gave him politeness instead.

8.   He scoured the ground for tiny trip wires or depression caps no larger than the buttons on a shirt.

9.   In another case, a Serb farmer discovered that mines with trip wires had been placed among the stalks of his corn crop.

10.   Investigators could not bring in the hounds until the bombs, trip wires and other booby traps were removed.