This is a special program that allows you entry into the US without a visa. Under this program you will only be allowed a maximum of 90 days’ stay within the borders of the United States. There are some important conditions for eligibility, however. First, you must be entering the US as a tourist. Second, you must have a valid passport. Third, you must be the citizen or subject of one of these countries, kingdoms or municipalities: Andorra, Argentina, Austria, Australia, Belgium, Brunei, Denmark, Finland, France, Germany, Great Britain, Ireland, Iceland, Italy, Japan, Liechtenstein, Luxembourg, Monaco, New Zealand, Norway, San Marino, Sweden, Switzerland, and Spain.
 
  There is no guarantee that all applicants will be granted this visa when they apply for it at a US port of entry. While it does not happen often, there are instances of rejection.