31.   The trip wires are set.

32.   This checks for trip wires imperceptible from a safe distance.

33.   Their purpose is to serve as a trip wire, stalling a North Korean invasion long enough to mobilize South Korean and United Nations forces.

34.   Without agreement over how to handle the date, what was intended to be a brass ring could instead become a trip wire for violent confrontation.

35.   In another case, a bomber was caught after his distinctive bite mark was matched with imprints left on fishing line trip wires at three separate bomb sites.

36.   A civilian was killed and three others injured on Thursday when their car hit a trip wire setting off a roadside bomb in southern Lebanon, security services said.