Citizens from 27 countries plus Canada can travel to the United States without a visa and are exempt from being fingerprinted and photographed at U.S. airports and seaports under a new anti-terrorism program the Homeland Security Department (search) launched Monday.

Those foreigners can enter the United States with passports for business or pleasure for up to 90 days. To travel for other purposes or to stay longer, they must have a visa and would be subject to the checks for other arriving foreigners under the new US-VISIT program (search).

Most citizens of Canada need neither a passport nor a visa, but must carry proof of citizenship.

By October, visitors from the exempt countries must have a machine-readable passport to enter the United States. If not, they will be required to have a visa and will be subject to US-VISIT checks.

The countries are:

Andorra, Australia, Austria, Belgium, Brunei, Denmark, Finland, France, Germany, Iceland, Ireland, Italy, Japan, Liechtenstein, Luxembourg, Monaco, Netherlands, New Zealand, Norway, San Marino, Slovenia, Spain, Sweden, Switzerland, United Kingdom, Portugal and Singapore.