“Rules requiring Irish citizens to carry high-tech passports when visiting the US are to be dropped because the technology behind the scheme is seen as unreliable. The US Department of Homeland Security had previously set an October 2005 deadline for the inclusion of biometric information chips in the passports of European citizens who avail themselves of the Visa Waiver programme. This programme allows people to make short-term visits to the US without a visa. The chips would have included a variety of biological information about the passport holder, such as their fingerprints and retina scans.” http://www.theregister.co.uk/2005/06/13/us_bio_passports/