Diamond Heist Spurs Drive to Plug Vulnerable Airport Perimeters

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Airports are developing electronic tripwires to protect miles of perimeter fencing and thwart incidents such as this week’s $50 million diamond heist in Belgium, which saw thieves use cars to breach the boundary.

QinetiQ Group Plc, a U.K. maker of spy equipment, Israeli security specialist Elbit Systems Ltd. and U.S.-based Verint Systems Inc. are among companies developing intruder-detection systems they say can thwart a similar raid. Heathrow airport, Europe’s busiest, is testing a combination of monitoring systems to gain a comprehensive picture of its surrounding fences.