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1 .This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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2 .Practice makes perfect.
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3 .And that may be especially true for the security agents who screen your luggage,
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4 .because a new study finds that transportation security officers become better at detecting threatening items when they appear more frequently.
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5 .Remaining on the lookout for hidden weapons can be mentally exhausting, particularly when the items in question are so rarely seen.
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6 .That fatigue could translate into missing something deadly when it finally does show up.
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7 .So researchers put some newly trained security officers to the test.
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8 .They asked the agents to eyeball the x-rays of five sets of bags and call out if they saw any guns, knives or bombs.
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9 .In the first three sets and in the last one the banned objects were few and far between.
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10 .But the fourth set was a jackpot.
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11 .Turned out that the agents were better at spotting danger when there was more danger to spot.
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12 .And this eagle-eye acuity carried over to when the threat level once again dropped.
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13 .The findings can be seen in the Journal of Vision.
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14 .The results suggest that airport security might be beefed up by letting agents spot a simulated stockpile of arms before they scan for the rare real things.
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15 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.
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