Diary of a rail fan in Kansai,Japan(Ver.2)

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Why can we reduce time of baggage inspections?

edition.cnn.com

Even if immigration and boarding procedures are automated ,and we can reach boarding gates earlier than the past, it's difficult to minimize time of carry-on baggage inspections.
That's because it takes a long time for passengers to collect belongings made of metals before passing through the metal detector.
Unless invention of the device distinguishing hazardous metals, it must be omit time of baggage inspections.