The data infrastructure and sunk costs are quite high for systems like this, and the non-zero defect or failure rates mean you still generally have to employ mo

The data infrastructure and sunk costs are quite high for systems like this, and the non-zero defect or failure rates mean you still generally have to employ most of the same staff. Right, which is why one could reasonably speculate that CBP is picking up the cost of the system. Without the capital costs it could easily make sense. The clincher would be how edge cases are handled. Is CBP paying for a human behind the scenes to remotely override rejections? Is it acceptable customer service for falsely rejected passengers to wait at the gate until shortly before departure when an airline employee can show up to double-check their documents?