What is the visa waiver program?

Nationals of specified countries can travel to the U.S. under a blanket “visa waiver pilot program” without first having to apply for a visa. The travelers must, however, have a valid passport that is machine-readable with biometric identifiers. The visa waiver visitor is still subject to inspection upon arrival in the U.S. and a decision on admissibility is made at that time. Persons admitted under the visa waiver program may not remain longer than 90 days.