Just went through 2 “secondary security” checks at San Francisco airport today and got introduced to this delightful contraption.
“To collect microscopic particles for analysis, the EntryScan3 takes advantage of a natural upward airflow around the body called the “human convection plume.” By not using forced airflow from a fan-which stirs up dust and other contaminants-cleaner samples are collected.”
What this means is that you walk into this box with glass doors on one end and without warning they will spray you with air quickly and at every angle. Not only is it really scary and unexpected, but you also get the added pleasure of having it blow your shirt upwards… not usually what you’re looking for from a security device.
Gotta love the US.