People handling airfreight are aware of valuable consignments because every cargo shipment carries a waybill, which is similar to a passenger's boarding pass.

WSJ: Gunmen Waylay Jet, Swipe Diamond Trove

Analysis tools, when combined with targeted screening of air cargo, help detect suspicious shipment patterns.

FORBES: Air Cargo Security: Time For The World To Take New Measures

When the shipment arrived at Expeditors' warehouse in Hong Kong, staff reassembled the cargo into airplane-ready units, enclosing each batch in plywood boards, plastic sheets and netting.

FORBES: I'll Handle That

When the shipment arrived at Expeditors' warehouse in Hong Kong, staff reassembled the cargo into airplane-ready units, surrounding each batch with plywood boards, plastic sheets and netting.

FORBES: I'll Handle That