The USA remains one of the most popular countries in the world as an immigration destination. Millions of foreign visitors travel to the US each year. Others come to live here permanently. International visitors and immigrants add greatly to USA cultural, education and economic life. USA welcomes them and makes their stay safe. If you’re a citizen of a foreign country, in most cases you'll need a visa to enter the United States. More than a sixty kinds of visas are available according to the visit purpose. Some of them are;