It seems like this practice started in around 2004 according to the BBC news at that time. It is digital fingerprinting and taking pictures of people's faces as well that is done for all non-US passport holders on visits to the US or green card holders upon re-entry. Unless you are a US passport holder (i.e.US citizen), you will need a scan-able passport and may need to do an online Visa before arrival too.
Since the policies are often changing, check the official USCIS home pageuscis.gov/portal/site/uscis for the most current information on your particular status before entering the US. Most non-US country passport holders must also attain a short-term visa: B-1 for Business trips and B-2 for pleasure trips. travel.state.gov/visa/temp/types/types_1... See an overview of the Visa situation on this official US government page: http://travel.state.gov/visa/visa_1750.html The video is a promotional one for the use of digital photos and fingerprinting for security, called "biometrics" Hope this helps, @jjwalsh.
For more information, see Visa and Foreign Entry Requirements. Hemisphere (Caribbean, Bermuda, Panama, Mexico and Canada). Details, see Western Hemisphere Travel Initiative.
Sanction Programs and Country Summaries. What information do foreign nationals need? Travel abroad during a longer stay in the United States.
For the country they plan to visit. Information on visa requirements. Still be valid when they return to the United States.
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