Presumably they only care about false negatives, not false positives.<p>...which doesn&#x27;t imply that a &quot;just question 100% of the people&quot; strategy would work—they need to question <i>few enough</i> people that the planes still leave on time and the airlines stay in business. But within that limit, it&#x27;s in their best interest to be as trigger-happy with the detainments as possible.