শুক্রবার, ২১ জুন, ২০১৩

Walk-Through Metal Detectors Were Invented to Catch Thieving Employees

Walk-Through Metal Detectors Were Invented to Catch Thieving Employees

Today we walk through metal detectors to get into courthouses, airports, and even concert venues. But back in the 1920s the first walk-through metal detectors weren't invented for finding weapons (or nail clippers), they were invented for searching would-be thieves.

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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/TEjKgzxbrB4/walk-through-metal-detectors-were-invented-to-catch-thi-520336775

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