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A sign directs travelers to a security checkpoint staffed by Transportation Security Administration workers at O'Hare Airport on June 2, 2015 in Chicago, Illinois.
A sign directs travelers to a security checkpoint staffed by Transportation Security Administration workers at O'Hare Airport on June 2, 2015 in Chicago, Illinois.

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    How to detect explosives with an airport's X-ray

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How to detect explosives with an airport's X-ray

How difficult would it be for an explosive to get through airport security in the U.S.? CNN's Miguel Marquez reports.

How to detect explosives with an airport's X-ray

How difficult would it be for an explosive to get through airport security in the U.S.? CNN's Miguel Marquez reports.