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Why airport liquids are limited to 100 milliliters

HERE’S THE INTERESTING PART

Your expensive face cream is a national security threat entirely due to metric conversions. The TSA arbitrarily settled on 3.4 ounces for carry-on liquids simply because the rest of the world uses the metric system, and 100 milliliters translates to 3.4 ounces. It has absolutely zero scientific correlation to bomb-making capabilities; it's just a nice, round European number.

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Why airport liquids are limited to 100 milliliters
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