Helicopters and truck-sized X-ray machines for Super Bowl fans
Commissioner R. Gil Kerlikowske was on hand for a demonstration of the agency's Black Hawks and large mobile X-ray machines that are used to detect contraband and explosives. -The X-ray machines are mobile and the size of a large truck.
They slowly pan outside a semi-truck while operators look for anomalies. The X-ray machines are in heavy use at the Mariposa Port of Entry in Nogales,
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