A closer look
Teaching airport security to spot a terrorist by looking for a microscopic facial twitch is like asking them to count raindrops during a hurricane. Paul Ekman’s research on microexpressions—fleeting facial movements revealing true emotion—is legendary, but virtually useless when the observer's brain is overloaded. When you add the cognitive load of scanning IDs, managing angry passengers, and remembering protocol, the human brain simply drops the processing power required to catch a 1/25th of a second grimace. Your brilliant lie-detection skills vanish the second you have to multitask.
