> How do you know they don't have a button to push to make it give a false positive so they can hold people? That exact thought crossed my mind afterwards. In

> How do you know they don't have a button to push to make it give a false positive so they can hold people? That exact thought crossed my mind afterwards. In the end, they never showed me any evidence that the machine had actually detected any explosive. Nor did they figure out what could have caused the "false positive". Maybe they did detect something, but then what's equally surprising is the thought that they would then just let someone go after they have walked into JFK with explosives on their body.