@WSJ Retinal scans would B a good one to install.Officers could know any drug/alcohol taken in last 9hrs.Used by industry in high risk areas
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@WSJ: How airports are starting to use facial-recognition technology and tracking beacons: http://on.wsj.com/1MaOZFO ”#EDU8308Thanks. Twitter will use this to make your timeline better. UndoUndo
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