Not sure whether this the right place or whether it should be in General Chat.

Just got home after a lovely holiday that stuttered into life on arrival at Sanford when my missus was asked to step into an interview room for some further questioning while me and the kids were told to just go and collect our luggage.

After an agonisingly long 15 minute wait for her it turns out that Finger Prints are apparently not 100% unique.

Homeland Security questioned her about her previous visits to the US (1st time travelling on a new biometric passport) and whether she'd ever been in trouble with the law etc.

They then said everything was fine but that she shares the same (or at least almost identical) fingerprints as 5 other people that they are aware of and unfortunately 3 of those people are "dodgy" and are either wanted by the FBI or are on a denied entry list.
They wouldn't tell her what the problem was with these 3 people other than they were very dodgy.