So, do americans WANT you to feel like a criminal before you even enter the country!
Source: http://www.theregister.co.uk/2007/03/21/us_travellers_fingerprints/
The US will increase the amount of information it holds on foreign visitors when it takes all 10 fingerprints from air travellers rather than the usual two.
Currently foreign travellers must have their index fingers scanned into a database when they enter the US by agents of the Department of Homeland Security. Those prints can then be checked against a database of fingerprints held by police forces or the FBI
That number will increase to all 10 fingerprints on a trial at 10 US airports. It is planned that the programme will be in place in all airports in around a year, according to a report in The Daily Telegraph.