> CBP/ICE already collects retinal scans and fingerprints of people with visas from many countries. Plus there's the FBI face recognition database. Permanent r

> CBP/ICE already collects retinal scans and fingerprints of people with visas from many countries. Plus there's the FBI face recognition database. Permanent residents too (no retinal scan but digital fingerprints and photo every time you pass through immigration at an airport).