United States (U.S.) visa policy permits citizens of certain countries to travel to the U.S. without a visa, when they meet certain requirements, under U.S. laws. Visitors from other countries are required to obtain visa. Recent changes in U.S. laws governing visa policy and procedures have increased the amount of time it can take to obtain a visa; generally it may take about 30 days. If you are visiting from a country from where visa is required, please plan to schedule your visa interview well in advance of your departure date. Contact the local U.S. embassy or consulate for details and instructions. The following URLs provide more details:

VISA Waiver Program
U.S. VISA Policy